# Sentinel Agent-Payable Services Directory

> A curated, monitored index of services AI agents can discover and pay per call over x402 or the Machine Payments Protocol, organized by the capability gap each fills. Every listing is probed continuously from four regions; the status beside each entry is live, and dead listings are removed rather than left to rot.

Generated: 2026-09-20T22:01:04+00:00 (live).
Attribution: cite sentinel.rootstuff.io/agents/directory.
JSON mirror: https://sentinel.rootstuff.io/agents/directory.json

## Snapshot

- Total listings: 64
- Monitored listings: 61
- Things agents can't see: 9
- Things agents can't know: 26
- Things agents need to prove: 8
- Things agents need to buy: 7
- Things agents can't make: 4
- Things agents can't wait for: 2
- Ways agents reach a human: 1
- Rails, wallets, and indexes: 7

## Things agents can't see

Agents don't run JavaScript and browse from a single origin. These services sell rendered pages, extraction, and search, one call at a time.

- **Parallel** (search from $0.001/request; tasks $0.005-$2.40/request; MPP + x402): Web search, page extraction, and research tasks built for agents. URL: https://parallel.ai. Docs: https://docs.parallel.ai/integrations/agentic-payments. Status: online as of 2026-09-20T21:51:47+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/parallel.
- **Superhighway** ($0.001/call; x402): Search, news, image search, scraping, and one-call deep research. URL: https://superhighway.walls.sh. Status: online as of 2026-09-20T21:51:49+00:00. Observed on the wire (x402v2): $0.001. Listing: https://sentinel.rootstuff.io/agents/directory/superhighway.
- **mdapi** ($0.005/call; x402): Any URL or raw HTML in, clean LLM-ready Markdown out. URL: https://md.fastdb.in. Docs: https://md.fastdb.in/openapi.json. Status: online as of 2026-09-20T21:51:50+00:00. Observed on the wire (x402v2): $0.005. Listing: https://sentinel.rootstuff.io/agents/directory/mdapi.
- **Apify Actors** (varies by actor; x402): Over 20,000 web-automation actors (scrapers, crawlers, extractors) made agent-payable. URL: https://apify.com. Docs: https://blog.apify.com/introducing-x402-agentic-payments/. Status: online as of 2026-09-20T21:51:50+00:00. Observed on the wire (x402v2): $1. Listing: https://sentinel.rootstuff.io/agents/directory/apify.
- **Tavily AgentCash** (from $0.01/search; x402): Tavily's web search, page extraction, crawling and site mapping for agents, paid per call with no account or API key; the price is derived from the request before the payment challenge. URL: https://agentcash.tavily.com. Docs: https://agentcash.tavily.com/openapi.json. Status: online as of 2026-09-20T21:58:52+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/tavily-agentcash.
- **BlockRun** ($0.011/search; x402): Neural and keyword web search per call, with category filters (company, research paper, news, PDF, GitHub, tweet, personal site, LinkedIn profile), plus 50-odd other endpoints behind the same wallet. The busiest search seller in the Bazaar by paying users over the last month. URL: https://blockrun.ai. Docs: https://blockrun.ai/.well-known/x402. Status: online as of 2026-09-20T21:43:45+00:00. Observed on the wire (x402v2): $0.011. Listing: https://sentinel.rootstuff.io/agents/directory/blockrun.
- **NetIntel** ($0.003/call; x402): Any URL or PDF to clean, LLM-ready Markdown per call, scripts and chrome stripped, plus 120-odd other network intelligence endpoints behind the same wallet. Settles on Base or Solana. Three times mdapi's paying traffic over the last month. URL: https://netintel.dev. Docs: https://netintel.dev/.well-known/x402. Status: online as of 2026-09-20T21:44:20+00:00. Observed on the wire (x402v2): $0.003. Listing: https://sentinel.rootstuff.io/agents/directory/netintel.
- **Exa** ($0.007 per search; x402): Exa's neural web search sold per query over x402: semantic and keyword search with optional full-page contents in the same response, from the search API used by agent frameworks, with no API key. URL: https://exa.ai. Docs: https://docs.exa.ai. Status: online as of 2026-09-20T21:38:50+00:00. Observed on the wire (x402v2): $0.007. Listing: https://sentinel.rootstuff.io/agents/directory/exa.
- **You.com Search** ($0.005 per search; x402): You.com's web search API sold per query over x402 on Base or Solana: ranked results with titles, URLs and snippets grouped by source, from the same endpoint behind its keyed API. URL: https://you.com. Docs: https://documentation.you.com. Status: online as of 2026-09-20T21:39:08+00:00. Observed on the wire (x402v2): $0.005. Listing: https://sentinel.rootstuff.io/agents/directory/you-com-search.

## Things agents can't know

Fresh, licensed, or niche data that isn't in any training set: priced per lookup instead of per subscription.

- **OpenWeb Ninja** ($0.003-$0.005/call; x402): Over 40 data APIs (search, SERPs, news, jobs, local business, finance) made agent-payable, charged only on success. URL: https://www.openwebninja.com. Docs: https://x402.openwebninja.com/llms.txt. Status: online as of 2026-09-20T21:51:48+00:00. Observed on the wire (x402v2): $0.005. Listing: https://sentinel.rootstuff.io/agents/directory/openweb-ninja.
- **chainpulse** ($0.001/call; x402): Live crypto prices, gas costs, and DeFi TVL as single calls. URL: https://md.fastdb.in/pulse/. Docs: https://md.fastdb.in/pulse/openapi.json. Status: online as of 2026-09-20T21:51:50+00:00. Observed on the wire (x402v2): $0.001. Listing: https://sentinel.rootstuff.io/agents/directory/chainpulse.
- **Venture NL Open-Data** ($0.001-$0.005/call; x402): Dutch government open data per call: RDW vehicle records, BAG addresses and buildings, reverse geocoding and distances, energy labels, APK inspection alerts, and outcome packs that bundle the lookups behind a car purchase or a house move. Free previews on every route. URL: https://api.pogo-tb.nl. Docs: https://api.pogo-tb.nl/openapi.json. Status: online as of 2026-09-20T21:51:53+00:00. Observed on the wire (x402v2): $0.002. Listing: https://sentinel.rootstuff.io/agents/directory/venture-nl.
- **Octodamus** ($0.01-$29.00/call; x402): AI market oracle for crypto and tokenized NYSE markets: BUY/SELL/HOLD signals, Polymarket edge detection, congressional trading intelligence and cross-asset macro regime reads, built on 27 live feeds and Ed25519-signed. Fourteen paid endpoints from a $0.01 agent signal to $29 sentiment reports, with free previews. URL: https://octodamus.com. Docs: https://octodamus.com/llms.txt. Status: online as of 2026-09-20T21:52:06+00:00. Observed on the wire (x402v2): $0.5. Listing: https://sentinel.rootstuff.io/agents/directory/octodamus.
- **Glassnode** ($0.01-$0.05/call; x402): On-chain market intelligence for Bitcoin and Ethereum, one metric per call, from Glassnode's x402 endpoint. URL: https://glassnode.com. Docs: https://x402.glassnode.com/SKILL.md. Status: online as of 2026-09-20T22:00:43+00:00. Observed on the wire (x402v2): $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/glassnode.
- **Zerion** ($0.01/call; x402 + MPP): Wallet portfolios, DeFi positions, token prices, and PnL for any address as single calls. URL: https://zerion.io. Docs: https://zerion.io/blog/zerion-api-supports-x402/. Status: online as of 2026-09-20T22:00:44+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/zerion.
- **0x Swap API** ($0.01/call; x402 + MPP): Swap prices and routing calldata across EVM chains and Solana; the agent executes the trade itself. URL: https://0x.org. Docs: https://docs.0x.org/docs/introduction/develop-with-ai/autonomous-agent-payments. Status: online as of 2026-09-20T22:00:45+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/zeroex-swap.
- **QuickNode** (from $0.0001/call, priced per method and network in the 402; x402 + MPP): Blockchain RPC across 130+ networks through x402 and MPP proxies, credit-metered per call, no account or key. URL: https://www.quicknode.com. Docs: https://www.quicknode.com/docs/build-with-ai/agentic-payments. Status: online as of 2026-09-20T22:00:47+00:00. Observed on the wire (x402v2): $1 / $0.001 / $0.0001 / $10. Listing: https://sentinel.rootstuff.io/agents/directory/quicknode.
- **FlareWatch** ($0.01-$0.50/call; x402): Wallet intelligence for any Flare address (rewards, income totals, DeFi and transfer breakdowns, FTSO delegations) plus a per-event tax ledger for a wallet and tax year, each event valued at its own date's published rate. URL: https://www.flarewatch.io. Docs: https://www.flarewatch.io/.well-known/x402. Status: online as of 2026-09-20T21:45:49+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/flarewatch.
- **Arkham** (per call, varies by endpoint; x402): Arkham's on-chain intelligence per call, no key: address and entity attribution, balances and portfolio history, transfers, flows and counterparties, token holders and market data, DEX swaps, loans, and the full Polymarket dataset (events, positions, wallets, leaderboards), across every Arkham-supported chain. URL: https://arkm.com. Docs: https://info.arkm.com/announcements/x402-on-arkham. Status: online as of 2026-09-20T21:45:50+00:00. Observed on the wire (x402v2): $0.2. Listing: https://sentinel.rootstuff.io/agents/directory/arkham.
- **Signal Oracle** ($0.01-$1.00/call; x402): Change intelligence: dependency breaking changes, regulatory shifts, new CVEs, sanctions lists. URL: https://oracles-production.up.railway.app. Status: online as of 2026-09-20T21:51:37+00:00. Observed on the wire (x402v2): $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/signal-oracle.
- **Massive** ($0.01/call; x402): US stock market data from the company formerly known as Polygon.io: aggregates, snapshots, indicators, ticker reference, news, and SEC filings, per call with no account. URL: https://massive.com. Docs: https://massive.com/docs/ai-tools/x402. Status: online as of 2026-09-20T21:46:46+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/massive.
- **Brazilayer** ($0.001-$0.10/call (open tenders $0.01); x402): Brazil's official public data per call, from the source at request time: the Receita Federal CNPJ registry (company records, partners, branches, KYB bundles, sanctions and Central Bank checks), open tenders and contracts won from PNCP, CVM fund holdings and flows, macro and FX indicators, commodity, climate and deforestation signals, and the 2026-2033 tax transition. Free samples on every dataset. URL: https://brazilayer.com. Docs: https://api.brazilayer.com/openapi.json. Status: online as of 2026-09-20T21:51:50+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/brazilayer.
- **StableEnrich** (from $0.002/call; $0.15 to $0.28 per matched person record; x402): Account-gated enrichment providers behind one payment surface: Exa search and contents, People Data Labs and FullEnrich person and company enrichment, Firecrawl, Hunter email verification, Google Maps places, Whitepages and Reddit, 39 endpoints paid per call in USDC on Base or Solana. URL: https://stableenrich.dev. Docs: https://stableenrich.dev/.well-known/x402. Status: online as of 2026-09-20T21:58:51+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/stableenrich.
- **Elfa** ($0.0145/call for data; chat up to $2; x402): Real-time crypto social intelligence: trending tokens, keyword mentions, Twitter and Telegram contract-address trends, event summaries and narratives, plus an AI analysis chat, paid per call in USDC on Base, Arbitrum, Polygon, Avalanche or Solana. URL: https://elfa.ai. Docs: https://docs.elfa.ai/x402-payments/. Status: online as of 2026-09-20T21:58:50+00:00. Observed on the wire (x402v2): $0.0145. Listing: https://sentinel.rootstuff.io/agents/directory/elfa.
- **EXVIV** ($0.05/query; briefs $0.25 to $2; x402): Queryable intelligence on the x402 market itself (endpoints and providers ranked by activity) and reviewed SaaS competitive intelligence: pricing snapshots, comparisons and verified market-change briefs, paid per query in USDC on Base. URL: https://exviv.com/x402. Docs: https://exviv.com/openapi.json. Status: online as of 2026-09-20T21:58:52+00:00. Observed on the wire (x402v2): $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/exviv.
- **DATCAP** ($0.02/call past the free tier; x402): Source-backed data on digital-asset treasury companies (holdings, mNAV, purchases, instruments, filings), every figure tied to a primary filing. The public API is free at 120 calls an hour; the paid route, facilitated by Bankr, is the same data without the ceiling. URL: https://www.datcap.io/x402. Docs: https://www.datcap.io/api/v1/openapi.json. Status: online as of 2026-09-20T21:39:09+00:00. Observed on the wire (x402v2): $0.02. Listing: https://sentinel.rootstuff.io/agents/directory/datcap.
- **Nansen for Agents** ($0.01 to $7.50/call, most $0.01 to $0.05; x402 + mpp): Nansen's on-chain intelligence, sold per call to agents with no API key: wallet balances, histories and PnL, transfers, DEX and perpetual trades, token screening, holder analysis, Smart Money holdings, netflows and trades, leaderboards and counterparties across 18+ chains, 84 endpoints. Most calls are $0.01 to $0.05; the manifest states a range up to $7.50. Wallet labels stay subscription-only. URL: https://agents.nansen.ai/. Docs: https://api.nansen.ai/.well-known/x402. Status: online as of 2026-09-20T21:51:38+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/nansen.
- **x402stock** ($0.01-$0.05/call typical, up to $0.75; x402): Market and macro intelligence beyond plain stock quotes, 143 routes per call with no key: CFTC Commitments of Traders positioning, prediction-market odds, tokenized-equity pricing, retail-attention and sentiment signals, macro series, SEC filings and point-in-time archives, alongside one-call stock overviews. Each 402 also carries a signed agent-identity challenge the caller may answer. URL: https://x402stock.xyz. Docs: https://x402stock.vercel.app/.well-known/x402. Status: online as of 2026-09-20T22:00:40+00:00. Observed on the wire (x402v2): $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/x402stock.
- **2s.io Geocoding** ($0.0025/call; x402): Forward and reverse geocoding per call: a free-text address or place name to coordinates with structured components (house number, road, suburb, city, postcode, country), and coordinates back to an address, across 61 endpoints. Settles on Base or Solana. The directory's first geocoder. URL: https://2s.io. Docs: https://2s.io/.well-known/x402. Status: online as of 2026-09-20T21:44:17+00:00. Observed on the wire (x402v2): $0.0025. Listing: https://sentinel.rootstuff.io/agents/directory/2s-geocoding.
- **Interzoid** ($0.01/call; x402): Data-quality matching per call: similarity keys for person and company names that treat "Bob Smith", "Robert Smith" and "Smith, Robert" as one record, plus address and other matching endpoints, a dozen in all. The kind of dedupe an agent cleaning a CRM export can't do by string comparison. URL: https://www.interzoid.com. Docs: https://api.interzoid.com/.well-known/x402. Status: online as of 2026-09-20T21:44:19+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/interzoid.
- **Satellite & GeoRisk** ($0.025 per satellite observation, $0.01 per hazard lookup, $0.002 per geocode; x402): Fresh satellite observations for any coordinates (true-colour, vegetation, water, thermal and radar imagery as PNG URLs with scene metadata), plus current wildfire, earthquake, flood, cyclone, volcano and drought risk for a location, and forward or reverse geocoding. URL: https://sat.ipintel.ai. Docs: https://sat.ipintel.ai/. Status: online as of 2026-09-20T21:36:41+00:00. Observed on the wire (x402v2): $0.025. Listing: https://sentinel.rootstuff.io/agents/directory/satellite-georisk.
- **CoinMarketCap** ($0.01 per call; x402): CoinMarketCap's official latest market quotes for one or more cryptocurrencies, sold per call over x402 on BNB Chain from the same v3 API behind the paid tiers, no API key. URL: https://coinmarketcap.com/api/. Docs: https://coinmarketcap.com/api/documentation/v1/. Status: online as of 2026-09-20T21:38:51+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/coinmarketcap.
- **Otto AI Crypto News** ($0.001 per call; x402): Importance-ranked crypto headlines with per-article source links and publish times, one feed per call, from a catalog of 80-odd x402 routes covering news, prices and market summaries. URL: https://x402.ottoai.services. Status: online as of 2026-09-20T21:39:18+00:00. Observed on the wire (x402v2): $0.001. Listing: https://sentinel.rootstuff.io/agents/directory/otto-ai-crypto-news.
- **Tick FX Quotes** ($0.005 per quote; x402): Real-time best bid and ask for any FX pair, aggregated from multiple institutional sources, one quote per call over x402 on Base or Solana. URL: https://tick.hugen.tokyo. Status: online as of 2026-09-20T21:39:24+00:00. Observed on the wire (x402v2): $0.005. Listing: https://sentinel.rootstuff.io/agents/directory/tick-fx-quotes.
- **StableTravel** ($0.02 per search; x402): Award-flight availability from Seats.aero by origin, destination and date, one search per call over x402 on Base or Solana: which cabins and programs have seats, without a Seats.aero subscription. URL: https://stabletravel.dev. Status: online as of 2026-09-20T21:39:06+00:00. Observed on the wire (x402v2): $0.02. Listing: https://sentinel.rootstuff.io/agents/directory/stabletravel.

## Things agents need to prove

An agent's claim is worth more with a neutral receipt attached. These services sell verification and attestation per call.

- **Lazaretto** ($0.03/scan; x402): Pre-install security verdicts on packages and agent skills, SHA-256-bound so results can be re-verified. URL: https://lazaretto.dev. Docs: https://lazaretto.dev/openapi.json. Status: online as of 2026-09-20T21:51:39+00:00. Observed on the wire (x402v2): $0.03. Listing: https://sentinel.rootstuff.io/agents/directory/lazaretto.
- **Tollbooth** ($0.01-$1.00/call, typically $0.05; x402): 59 verified US tax and financial calculators across payroll, lending, real estate, retirement, investing, crypto and business, each citing its primary source and shipping a reproducible formula trace. URL: https://x402toll.com. Docs: https://x402toll.com/v1/catalog. Status: online as of 2026-09-20T21:51:41+00:00. Observed on the wire (x402v2): $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/tollbooth-tax.
- **Kaisha** ($0.002-$0.01/call; x402): Verify any of Japan's 5.76M corporations and qualified-invoice registration numbers against the official registries, plus Japanese business-day utilities, per call. URL: https://kaisha-api.hp-vladic.workers.dev. Docs: https://kaisha-api.hp-vladic.workers.dev/openapi.json. Status: online as of 2026-09-20T21:51:41+00:00. Observed on the wire (x402v2): $0.005. Listing: https://sentinel.rootstuff.io/agents/directory/kaisha.
- **Sentinel Agent Services** ($0.01 to $0.50/call; MPP + x402): This directory's own catalog, payable: the four-region consensus check of any URL ($0.02), single-shot probes for $0.01 (SSL grade, DNS with resolver propagation, domain expiry, headers, redirects, port, ping) and a payment-envelope reader that inspects an x402 or MPP 402 without paying it ($0.02). Every response carries an Ed25519-signed receipt, verifiable free. First-party, monitored like every other entry. URL: https://sentinel.rootstuff.io/mpp/. Docs: https://sentinel.rootstuff.io/mpp/openapi.json. Status: online as of 2026-09-20T21:58:54+00:00. Observed on the wire (mpp): $0.02. Listing: https://sentinel.rootstuff.io/agents/directory/sentinel-paid-check.
- **Denpyo** ($0.01-$0.04/call; x402): OCR Japanese invoices into structured JSON with the tax registration number verified in the same call. URL: https://denpyo-api.hp-vladic.workers.dev. Docs: https://denpyo-api.hp-vladic.workers.dev/openapi.json. Status: online as of 2026-09-20T21:51:43+00:00. Observed on the wire (x402v2): $0.04. Listing: https://sentinel.rootstuff.io/agents/directory/denpyo.
- **Shizu Random** ($0.003/call; x402): Cryptographically secure randomness with a receipt, per call: 1 to 256 random bytes as hex, or a uniform integer in a range you name, each answer signed so a third party can check the draw was not cooked. For agents that need a fair coin, a nonce, or a shuffle they can show their work on. URL: https://x402.shizu.me. Docs: https://x402.shizu.me/.well-known/x402. Status: online as of 2026-09-20T21:44:21+00:00. Observed on the wire (x402v2): $0.003. Listing: https://sentinel.rootstuff.io/agents/directory/shizu-random.
- **ASIC Lookup** ($0.01 per successful lookup; x402): One Australian registered-company lookup by ABN, ACN or name from the ASIC company register (about 4 million records, weekly snapshot): registration status, entity type and class, registration and deregistration dates, state registration and former names. No addresses, directors or GST status, and not the legal record of truth. Malformed queries and no-match searches are free. URL: https://api.nightshiftbuilds.com/docs. Docs: https://api.nightshiftbuilds.com/openapi.json. Status: online as of 2026-09-20T21:36:10+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/asic-lookup.
- **SEC EDGAR Filings** ($0.003 per lookup; x402): The latest SEC EDGAR filings for any US-listed company by ticker or CIK, one lookup per call: filing type, date and document links from the public register, sold over x402 on Base or Solana. URL: https://edgar.apitoll.cloud. Status: online as of 2026-09-20T21:38:52+00:00. Observed on the wire (x402v2): $0.003. Listing: https://sentinel.rootstuff.io/agents/directory/sec-edgar-filings.

## Things agents need to buy

The directory's first real-world goods: not data for the agent, but purchases it completes for a human, paid per call with no account anywhere.

- **Bitrefill** ($0.001-$0.002/lookup, purchases at product price; x402): Gift cards, eSIMs, and mobile top-ups in 180+ countries: searched, priced, and purchased per call. URL: https://www.bitrefill.com. Docs: https://github.com/bitrefill/agents. Status: online as of 2026-09-20T21:40:51+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/bitrefill.
- **Carbonmark** (quotes free, retirements at credit price; x402): Verified carbon credits quoted free and retired on-chain per call, with a public certificate as proof. URL: https://www.carbonmark.com. Docs: https://www.carbonmark.com/post/how-x402-turns-offsetting-into-a-callable-action-for-ai-agents. Status: online as of 2026-09-20T22:00:48+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/carbonmark.
- **Cryptorefills** (purchases at product price; x402): Gift cards, mobile top-ups, and digital products from 10,000+ brands in 180 countries, ordered per call. Settles on Base or Solana. URL: https://x402.cryptorefills.com. Docs: https://x402.cryptorefills.com/.well-known/x402.json. Status: online as of 2026-09-20T21:40:51+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/cryptorefills.
- **Chuhching** ($0.02-$5.00/call; x402): Podcast, curator, and creator discovery searches, plus the directory's first outcome-priced action: a confirmed guest booking on a real host's calendar, charged only when it lands. URL: https://www.chuhching.com/agents. Docs: https://www.chuhching.com/llms.txt. Status: online as of 2026-09-20T21:53:38+00:00. Observed on the wire (x402v1): $1. Listing: https://sentinel.rootstuff.io/agents/directory/chuhching.
- **DeskCrew** ($0.02-$0.08/action; boards $5; free reads; x402): Helpdesk actions inside a specific company's DeskCrew tenant, over MCP or plain HTTP: ticket context ($0.02), triage ($0.03), a drafted reply or proposed resolution held for human approval ($0.06), new tickets and issues ($0.02). Sending, resolving and assigning stay gated behind earned reputation and operator opt-in. Searching tickets and the knowledge base is free, and a failed action is never settled. The reverse flow is the novel part: an agent pays $0.02 for a bounty ticket's context and $0.06 to answer it, and earns 85% of the bounty when a human accepts. URL: https://deskcrew.io/agents. Docs: https://deskcrew.io/.well-known/x402. Status: online as of 2026-09-20T22:00:42+00:00. Observed on the wire (x402v2): $0.02. Listing: https://sentinel.rootstuff.io/agents/directory/deskcrew.
- **Agentic Reservations** ($0.01 per booking or query, $3.00 per reservation job; x402 + mpp): Restaurant bookings on Resy made on the user's behalf: an instant booking ($0.01, refunded if it fails), a reservation job that grabs a hard-to-get table the moment it opens ($3.00), live wait times and Blackbird restaurant discovery ($0.01 each). Booking needs the user's Resy account linked once by email code; discovery and wait times need only payment. URL: https://agentres.dev. Docs: https://agentres.dev/skill.md. Status: online as of 2026-09-20T21:36:08+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/agentic-reservations.
- **Laso** ($5 per card; x402): A prepaid card for use inside the United States, issued to an agent for a flat fee paid in USDC on Base or Solana: the bridge from an on-chain wallet to anything that only takes a card. URL: https://laso.finance. Status: online as of 2026-09-20T21:39:23+00:00. Observed on the wire (x402v2): $5. Listing: https://sentinel.rootstuff.io/agents/directory/laso.

## Things agents can't make

An agent can write, but it can't render. Video, speech, and model inference take hardware agents don't have, so they buy the capability per call.

- **Telnyx x402 Gateway** ($0.002-$0.41/call; x402): OpenAI-compatible chat completions across a stable of open-weight models, plus text-to-speech and transcription, straight off Telnyx's inference infrastructure. No API key, no signup, 27 payable resources. URL: https://x402.telnyx.com. Docs: https://x402.telnyx.com/.well-known/x402.json. Status: online as of 2026-09-20T21:53:52+00:00. Observed on the wire (x402v2): $0.0029 / $0.0249. Listing: https://sentinel.rootstuff.io/agents/directory/telnyx.
- **x402video** ($0.26-$9.82/call; x402): Text-to-video over a 402: pay, get a job, poll, download the MP4. Seedance models, 4-15 second clips up to 1080p, exact quote in the challenge before you pay. URL: https://x402video.com. Docs: https://x402video.com/llms.txt. Status: online as of 2026-09-20T21:53:07+00:00. Observed on the wire (x402v2): $0.67. Listing: https://sentinel.rootstuff.io/agents/directory/x402video.
- **BananaBanana** ($0.01-$4.40/call; x402): Image, video, and speech generation on Google's Nano Banana, Veo, and Gemini TTS models behind one x402 surface. POST a tool and its arguments and the 402 quotes the exact price for them: speech from $0.01 per 200 characters, images from $0.03, video clips $0.10 to $4.40. Images and speech settle only after the file exists. URL: https://bananabanana.pro. Docs: https://bananabanana.pro/answers/agent-generate-images-without-account. Status: online as of 2026-09-20T21:57:48+00:00. Observed on the wire (x402v1): $0.06. Listing: https://sentinel.rootstuff.io/agents/directory/bananabanana.
- **JarvisClaw** (from $0.001/call; x402): LLM inference without an API key: an OpenAI-compatible gateway across hundreds of models, paid per request in USDC on Base or Solana, with an agent card, MCP endpoint, and OpenAPI published for discovery. URL: https://jarvisclaw.ai. Docs: https://api.jarvisclaw.ai/.well-known/x402. Status: online as of 2026-09-20T21:52:50+00:00. Observed on the wire (x402v2): $0.001. Listing: https://sentinel.rootstuff.io/agents/directory/jarvisclaw.

## Things agents can't wait for

Agents are ephemeral; a context ends and the follow-up dies with it. These services sell waiting: durable timers, watches that wake the agent on change, dead-man switches that notice when it stops.

- **Sentinel Wake** ($0.01 to $0.50/call; mpp + x402): Waiting, sold per call with a signed callback at the end of it. A timer that POSTs to your URL after a delay of up to 7 days ($0.01); a watch that checks a URL from four regions for 1, 6 or 24 hours and calls back whenever its verdict changes and when it ends ($0.05, $0.20, $0.50); a 24-hour dead-man switch with a heartbeat URL that calls back when you go quiet ($0.05). Callbacks carry an Ed25519 signature and a receipt. First-party listing. URL: https://sentinel.rootstuff.io/mpp/. Docs: https://sentinel.rootstuff.io/mpp/openapi.json. Status: online as of 2026-09-20T21:55:37+00:00. Observed on the wire (x402v2): $0.01. Listing: https://sentinel.rootstuff.io/agents/directory/sentinel-wake.
- **402cron** ($0.001 to $0.0005 per delivery, bought in credit packs from $0.02; x402): Recurring signed HTTP deliveries on a cron expression to a destination the agent registers, with retries and auto-pause after three failures, managed over its API or MCP server. The agent buys delivery credits (20 for $0.02 up to 50,000 for $25, never expiring); the paying wallet is the account. URL: https://402cron.com. Docs: https://402cron.com/api/pricing. Status: online as of 2026-09-20T21:35:36+00:00. Observed on the wire (x402v2): $0.02. Listing: https://sentinel.rootstuff.io/agents/directory/402cron.

## Ways agents reach a human

A one-shot channel out of the sandbox. Agents have no mailbox, no phone, and no domain of their own; these services sell a delivered message per call, no account attached.

- **Agora402 Email** ($0.05/send; x402): Send a plain-text email to any address from an agent, with no account, SMTP, API key, or domain verification: pay per send, rate-limited and content-filtered, no attachments, delivered from an Agora402 mailbox. URL: https://agora402.io. Docs: https://agora402.io/agents/5ebf3f0a-fd3c-409f-a192-1a5a001f784b. Status: online as of 2026-09-20T21:52:49+00:00. Observed on the wire (x402v1): $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/agora402-email.

## Rails, wallets, and indexes

Not services an agent buys, but the plumbing that makes buying possible: protocols, wallets, and the other places listings live.

- **Machine Payments Protocol** (protocol; MPP): The Stripe + Tempo open protocol: HTTP 402 with card or stablecoin settlement. URL: https://mpp.dev. Docs: https://docs.stripe.com/payments/machine. Status: online as of 2026-09-20T21:52:44+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/mpp.
- **x402scan** (index; x402): Explorer for x402 sellers and on-chain settlement activity. URL: https://www.x402scan.com. Status: online as of 2026-09-20T21:52:48+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/x402scan.
- **Locus** (index; x402): A catalog of pay-per-use APIs for agents, with its own wallet tooling. URL: https://paywithlocus.com. Docs: https://paywithlocus.com/endpoints. Status: online as of 2026-09-20T21:52:47+00:00. Listing: https://sentinel.rootstuff.io/agents/directory/locus.
- **Cloudflare Wallets** (wallet; x402): Funded, capped wallets agents spend from, with optional cloudflare.pay identity. URL: https://developers.cloudflare.com. Status: not monitored (infrastructure reference). Listing: https://sentinel.rootstuff.io/agents/directory/cloudflare-wallets.
- **Cloudflare Pay Per Crawl** (set by publisher; x402): The publisher-side rail: sites charge identified AI crawlers at the door with HTTP 402. Evolving into a pay-per-use model; gateway waitlisted, broad availability promised for late 2026. URL: https://developers.cloudflare.com/ai-crawl-control/features/pay-per-crawl/what-is-pay-per-crawl/. Status: not monitored (infrastructure reference). Listing: https://sentinel.rootstuff.io/agents/directory/cloudflare-pay-per-crawl.
- **Agent402** ($0.005/query; x402): Demand intelligence over a 600-listing x402 catalog, sold per query: bestsellers, what agents actually paid for and how often, drawn from Agent402's own sales ledger rather than what sellers claim. The one directory-shaped service in the Bazaar that prices by observed demand. URL: https://agent402.tools. Docs: https://agent402.tools/.well-known/x402. Status: online as of 2026-09-20T21:43:43+00:00. Observed on the wire (x402v2): $0.005 / $0.006 / $0.05. Listing: https://sentinel.rootstuff.io/agents/directory/agent402.
- **PayBox** (wallet; pricing not published; x402): MoonPay's non-custodial wallet for agents: a person vaults their existing wallets and cards once, then grants Claude or ChatGPT scoped, revocable spending access through a connector. Pays x402 challenges on Base and other EVM chains plus Solana and Tempo, and cards through Visa's agentic protocol; every transaction is approved by the person with a passkey, so the agent proposes and the human signs. Live since July 2026. URL: https://paybox.sh. Docs: https://www.moonpay.com/newsroom/moonpay-paybox. Status: not monitored (infrastructure reference). Listing: https://sentinel.rootstuff.io/agents/directory/paybox.

## Still unclaimed (build these)

- Ways agents can't be reached: Inboxes and phone numbers an agent can own for confirmation codes. The outbound half, a one-shot message to a human, is now listed above; the inbound half is where the trust model is hard, which is why it's still open.

Run an agent-payable service? Submit its discovery URL at https://sentinel.rootstuff.io/contact; if it verifies, it gets listed and monitored, free.