HTTP 402 · Payment required

The services agents pay for

Agents can hold funded wallets now. This registry lists the APIs they can actually spend them on: discovered over x402 or Stripe's Machine Payments Protocol, priced per call, no signup anywhere.

Free to list, curated, verified by Sentinel. Dead listings are how directories rot, so every row here is probed from four regions and the verification column is live. Listed means reachable, not endorsed.

Registry state

services listed: 33
verified live: 31
cheapest call: $0.001
rails: MPP · x402

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.

4 services

liveParallel — Web search, page extraction, and research tasks built for agents.docsMPPx402from $0.01/call

liveSuperhighway — Search, news, image search, scraping, and one-call deep research.x402$0.001/call

livemdapi — Any URL or raw HTML in, clean LLM-ready Markdown out.docsx402$0.005/call

liveApify Actors — Over 20,000 web-automation actors (scrapers, crawlers, extractors) made agent-payable.docsx402varies by actor

Things agents can't know

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

13 services

liveOpenWeb Ninja — Over 40 data APIs (search, SERPs, news, jobs, local business, finance) made agent-payable, charged only on success.docsx402$0.003-$0.005/call

livechainpulse — Live crypto prices, gas costs, and DeFi TVL as single calls.docsx402$0.001/call

liveVenture NL Open-Data — Dutch government open data: vehicle records, addresses, geocoding.docsx402$0.001-$0.005/call

liveOctodamus — Market intelligence: derivatives, prediction-market odds, macro reference data.docsx402$0.01-$0.02/call

liveGlassnode — On-chain market intelligence for Bitcoin and Ethereum, per metric call, covering a trailing two-week window.docsx402$0.01-$0.05/call

liveZerion — Wallet portfolios, DeFi positions, token prices, and PnL for any address as single calls.docsx402MPP$0.01/call

live0x Swap API — Swap prices and routing calldata across EVM chains and Solana; the agent executes the trade itself.docsx402MPP$0.01/callobserved $0.01

liveQuickNode — Blockchain RPC across 130+ networks through x402 and MPP proxies, credit-metered per call, no account or key.docsx402MPPcredit-metered (alpha)

liveFlareWatch — 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.docsx402$0.01-$0.50/call

liveArkham — On-chain intelligence per call: balances, flows, entity attribution, and whale movements across chains.docsx402per call, varies by endpoint

liveSignal Oracle — Change intelligence: dependency breaking changes, regulatory shifts, new CVEs, sanctions lists.x402$0.01-$1.00/call

liveMassive — 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.docsx402$0.01/callobserved $0.01

liveBrazilayer Public Contracts — Live open tenders from the Brazilian government (PNCP), filterable by modality and state, queried from the official source at request time.docsx402$0.01/callobserved $0.01

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.

5 services

liveLazaretto — Pre-install security verdicts on packages and agent skills, SHA-256-bound so results can be re-verified.docsx402$0.03/scan

liveTollbooth — US tax and financial calculators that cite their IRS/SSA primary source and ship a reproducible formula trace.docsx402$0.02-$1.00/call

liveKaisha — Verify any of Japan's 5.76M corporations and invoice registration numbers against official registry data.docsx402$0.002-$0.01/call

liveSentinel Global Checkfirst-party — This directory's own probe, payable: any URL checked from four regions simultaneously, consensus verdict with a receipt. First-party listing, monitored like every other entry.docsMPPx402$0.02/callobserved $0.02

liveDenpyo — OCR Japanese invoices into structured JSON with the tax registration number verified in the same call.docsx402$0.01-$0.04/call

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.

4 services

liveBitrefill — Gift cards, eSIMs, and mobile top-ups in 180+ countries: searched, priced, and purchased per call.docsx402$0.001-$0.002/lookup, purchases at product price

liveCarbonmark — Verified carbon credits quoted free and retired on-chain per call, with a public certificate as proof.docsx402quotes free, retirements at credit price

liveCryptorefills — Gift cards, mobile top-ups, and digital products from 10,000+ brands in 180 countries, ordered per call. Settles on Base or Solana.docsx402purchases at product price

liveChuhching — 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.docsx402$0.02-$5.00/callobserved $1

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.

2 services

liveTelnyx x402 Gateway — 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.docsx402$0.002-$0.41/call

livex402video — 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.docsx402$0.26-$9.82/call

Rails, wallets, and indexes

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

5 services

liveMachine Payments Protocol — The Stripe + Tempo open protocol: HTTP 402 with card or stablecoin settlement.docsMPPprotocol

livex402scan — Explorer for x402 sellers and on-chain settlement activity.x402index

liveLocus — A catalog of pay-per-use APIs for agents, with its own wallet tooling.docsx402index

not probeableCloudflare Wallets — Funded, capped wallets agents spend from, with optional cloudflare.pay identity.x402wallet

not probeableCloudflare Pay Per Crawl — 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.x402set by publisher

Still unclaimed

An honest registry says what's missing as loudly as what exists. No live, payable service covers these yet.

vacantThings agents can't wait for — Durable timers, scheduled callbacks, watch-this-page-and-wake-me. Agents are ephemeral; nobody sells them waiting yet.

vacantWays agents can't be reached — Inboxes and phone numbers for confirmation codes, or clean one-shot channels to notify a human. The trust model is hard, which is why it's still open.

What verified means here

A trust signal is only worth what its method is worth, so here's the method.

cadenceEvery listing's discovery URL is probed every 30 minutes, around the clock, by the same Sentinel fleet that monitors production sites.

vantageProbes run from four regions: Ashburn, Portland, Nuremberg, and Singapore. One region's bad network path never flips a listing; it takes regional consensus to read unreachable.

criteriaA listing needs a working x402 manifest or MPP discovery endpoint, and it gets probed before it gets listed. Listing is free and human-curated, never pay-to-play. Rows that stop answering show it here first and get delisted if they stay dead.

badgeEvery listing can embed its own live status:

Run an agent-payable service?

If agents can discover and pay for your API today (a working x402 manifest or MPP endpoint), it belongs here. Send the discovery URL through the contact form; if it verifies, it's listed and monitored, free.

Not sure your API is agent-ready? The free AI Readiness Check detects x402 payment manifests.

Reading this as an agent? The directory is machine-readable: JSON and llms.txt, each listing with its live verification status, one request.