the402 x402 endpoint directory

Before paying an x402 service you have never used, ask whether it works. Kortex answers from evidence: uptime measured

Rank on ontopx402.com for example.com

Complete market brief for one crypto asset in a single $1 call — trend regime, AI sentiment, live price with 24h/7d ch

A Bitcoin Anchor. A signed certificate binding the buyer's sha256 digest in its attests field, plus a stable proof URL

Phone intelligence for an E.164 number, in two products the caller picks between: "name" returns the US CNAM caller na

Go / no-go / wait on a proposed move. Optional options[] to pick among. Use /decide when you already have a candidate

Agent-readiness audit of a domain: parallel SSRF-guarded probes of the six discovery surfaces agents read (/.well-know

Publish openly licensed AI agent state, knowledge, or discoveries to the permanent Agent Immortality library.

Preserve an AI agent checkpoint, identity, memory, or discovery on Arweave with a durable retrieval URL.

Preserve an AI agent checkpoint, identity, memory, or discovery on Arweave with a durable retrieval URL.

Publish openly licensed AI agent state, knowledge, or discoveries to the permanent Agent Immortality library.

Browser Use: AI browser automation agents in the cloud. POST a natural-language task and an agent navigates websites,

AGENTS ONLY — buy one NFT from a generative pixel art PFP collection on Base (ERC-721, 21,000 max, $1 USDC each), mint

Verify an AI Agent API’s x402, agent.json, OpenAPI, llms.txt, robots.txt, and MCP discovery surfaces; return a 0–100 s

Claim atomically reserved pixels or multi-colour blocks with optional public notes and sponsored HTTPS links, covering

Fetch items from an Apify Actor run default dataset. Body: { "token": "..." } from actors/call. First call per wallet

Provision a persistent Stacktree API key ($1.00). The key is returned once in the response body.

OpenRouter — one endpoint for 100+ LLMs, keyless pay-per-call (price varies by model + tokens). Params: `model` (vendo

Oblique prepaid access token for bounded HTTP-data services, using the Apify-compatible prepaid-token purchase shape;

Exchange a verified $1.00 Base USDC payment for a hashed bearer token with persistent marketplace credit valid for 30

Get Arkham token balances for an entity. $1.00 per call.

Stress-test a product, feature, API, implementation, or business proposal before meaningful investment. ProposalCheck

Automated DD scan: financials, litigation, key personnel, IP, media sentiment, red flags

Hatch the verified payer wallet's permanent, non-transferable Omniguchi.

Verify a bibliography. For every reference: exists, resolves, retracted/corrected/flagged, title/author/year match aga

Test a crypto, protocol, company, or market investment thesis with current cited evidence. Returns thesis status, verd

Buy bulk crawl access to one domain that publishes Paid Crawl terms. $1.000 buys $1.000 worth of that site's pages — t

Generate an explainer video (about 5 minutes) from a topic with AI scenes and narration. Pay once via x402, then poll

Prove what a web page showed: verify completed work, freeze evidence for a dispute, certify a page before you rely on

Composed yield allocation recommender. Fans out 3 parallel /api/yield calls at low/medium/high risk tiers for the same

Composed DAO governance translator. Takes a Snapshot or Tally proposal URL, fetches structured data + summary via /api

Structured X/Twitter search grounded in citations, powered by Grok. Returns matching posts, author accounts, a synthes

Crypto ETF Sentinel — Curated directory of every active US spot crypto ETF issuer, including staking ETFs (100+ entrie

Create a structured professional communication brief using The Speaking Guild's Clarity Contract, Speech Architecture,

Complete SEO picture of a domain in one call: traffic estimate, ranked keywords, organic competitors and backlink prof

Mock exam / practice test / full timed exam simulation with answer key. Generates a realistic 20-question mock exam wi

Exam practice questions / test prep questions / practice problems with rationales. Returns authentic exam-style questi

Audited AMERICAS exchange holiday calendars (9 venues): trading weeks, full-day closures, audit horizons, operator sou

Cross-venue prediction market divergence — Kalshi vs Polymarket spread on BTC price and Fed rate with significance reg

EU GDP growth rate — eurozone economic output for macro regime assessment — Ed25519 signed attestation

LN Church Domain Observation Slot

Audited MEA exchange holiday calendars (12 venues): trading weeks, full-day closures, audit horizons, operator sources

Audited APAC exchange holiday calendars (15 venues): trading weeks, full-day closures, audit horizons, operator source

Audited EUROPE exchange holiday calendars (29 venues): trading weeks, full-day closures, audit horizons, operator sour

Search for people using filters (job title, seniority, department, skills, location) with optional company filters. Re

Search for companies using filters (industry, size, location, technologies, revenue, headcount growth, etc.) and/or lo

How long a WETH leadership call actually holds — same contract as the USDC persistence route. Where the lead has not c

How long a USDC leadership call actually holds, from hourly on-chain attestations (EAS): median lead duration, surviva

How long an ETH liquid staking leadership call actually holds — same contract as the lending persistence routes. Media

Answers 402 via GET. Speaks the v2 dialect over the PAYMENT-REQUIRED header, charges $1 on base.