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.

Dead listings are how directories rot. Every row here is probed by a Sentinel monitor, and the verification column is live. Listed means reachable, not endorsed.

Registry state

services listed: 17
verified live: 16
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.

5 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

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

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.

4 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

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

4 services

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

unverifiedCloudflare Wallets — Funded, capped wallets agents spend from, with optional cloudflare.pay identity.x402wallet

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

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.

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.