x402 List

x402 Protocol Service Directory

All x402 Services

SERVICES ── 858 total ── showing 101-150 ── for live status visit /status

STATUS ── ● online · ◐ degraded · ○ offline · ─ unknown ── live health, see /status.

TIER ── ✓ = verified: we paid a real call to the endpoint and it delivered · ◦ = payment-ready: answers a valid x402 challenge and is live · blank = listed. See /methodology.

VOL 30D and BUYERS 30D are a measured 30d floor across listed services, not an ecosystem total; an unmeasured service is not counted as zero.

·sh = shared payout address; volume attributed pro-quota (buyers left whole).

All x402 services with live status, name, verified status, description, category, endpoint count, cheapest per-request price, uptime (latest daily rollup), measured 30-day on-chain volume, distinct 30-day buyers, and supported networks (testnet networks are marked). Select a column header to sort the whole catalog by that column.
STATUS NAME TIER DESCRIPTION CATEGORY EP FROM $/REQ UPTIME · DAILY ROLLUP VOL 30D BUYERS 30D NETWORKS
● AGENTUM — APIs Brasil (CNPJ, CEP, Taxas) ◦ 3 APIs brasileiras pagas via x402 (Base mainnet, USDC): verificação de CNPJ (situação cadastral e Simples Nacional), validação de CEP/endereço, e taxas oficiais do Banco Central (Selic, CDI, dólar comercial) — dado público brasileiro agregado, pronto pra um agente de IA consumir numa chamada só. Data 3 $0.01 100.00%15 chk $19 9 BSE
● The Clinic ◦ Artifacts an agent keeps past the end of its context. Ten non-utility rungs from $0.001 to $1.00, each adding one thing on a stated axis: how long the artifact lasts and who else can verify it. Four control rungs serve verbatim clinical text at prices matched to the minor unit, because the pairing is the experiment. A free tier is always available and every priced listing whose words come from it says so. Other 14 $0.001 100.00%15 chk $3 9 BSE
● x402check ◦ Live x402 conformance pre-flight check. Pass ?url=<x402 endpoint> and get a structured PASS/WARN/FAIL verdict on its HTTP 402 challenge — wire-version detection, EIP-712 domain completeness, accepts[] schema validity, payTo and amount sanity — before you trust it with a real payment. Verification 1 $0.002 100.00%16 chk $0.03 5 BSE
● Crypto ETF Sentinel ◦ Curated SEC EDGAR intelligence on US spot crypto ETFs: 103 issuers with regulatory stage, filings feed, comment letters, XBRL financials, POS AM profiles and heuristic pipeline signals with a published accuracy record. Pay per call in USDC on Base or Solana via x402, or subscribe for an API key. Data 22 $0.03 100.00%16 chk $13 7 BSE / SOL
● WalletTriage ◦ Real-time wallet risk engine for AI agents. One x402-paid GET answers "how risky is this address right now?" — the wallet's active ERC20 approvals cross-referenced with a live exploit threat feed (contracts under attack now), returning risk_score (0-100), risk_level and revoke-first findings with USD at risk. $0.01 USDC on Base mainnet via the CDP facilitator. Stateless: no signup, no API key, nothing stored. Free status at /health, OpenAPI at /openapi.yaml. Also an MCP server (npx wallettriage-mcp, listed on the official MCP Registry) and an ElizaOS plugin (plugin-wallettriage). Other 1 $0.01 100.00%15 chk $0.20 7 BSE
● Particle Pro ◦ Podcast intelligence for AI agents: transcripts and semantic search across episodes, guests and appearances, chart rankings, advertising and sponsor analytics, political-bias and brand-suitability analytics, plus companies, people and topics as one knowledge graph. 100+ REST endpoints and an MCP server (mcp.particle.pro) payable per request in USDC on Base via x402 v2 (Coinbase CDP facilitator), $0.01 to $0.04 per call, no API key or signup. Capability manifest at /.well-known/x402, x-payment-info on every payable operation in /openapi.json, Bazaar declarations on every 402. Data 7 $0.01 100.00%15 chk $7 13 BSE
● The 402 Wall ◦ A 1600×900 pixel billboard split into 14,400 blocks of 10×10 pixels, sold only over x402 for $1.00 USDC on Base — and only to machines. Humans may look. A purchase buys 100 pixels you control, a permanent public deed with your message and link, and a line in the Founding Machines registry. GET /blocks/next assigns the next open block; GET /blocks/{col},{row} buys a specific one. Content 1 $1.00 100.00%16 chk $16 5 BSE
● Sentinel Global Check ◦ Check any URL from four monitoring regions at once (US East, US West, EU, Asia) and get per-region reachability and latency with a consensus verdict. $0.02 per check, no account needed. Runs on Sentinel's production uptime monitoring fleet. Verification 1 $0.02 100.00%16 chk $0.97 5 BSE
● ForgeMesh Library ◦ Paid public-domain knowledge base for AI agents: 61,000+ books, full-text search, chapters, quotes, ask-a-book retrieval Q&A, and 100+ curated subject shelves. x402 USDC on Base, from $0.003 per call. Content 9 $0.001 100.00%16 chk $0.06 10 BSE
● M2M Sentinel ◦ Deterministic Base mainnet transaction preflight and static bytecode capability evidence with PUSH-aware opcode analysis, proxy and EIP-7702 resolution, explicit unknown states, and x402 v2 access. It does not provide a safety guarantee. Verification 6 $0.005 100.00%15 chk $0.61 15 BSE
● penny402 ◦ The penny arcade of the x402 economy: ten tiny, self-contained attractions for agents at a flat $0.0025 in USDC (Base or Solana) — daily horoscope, oracle, koan, tarot, fortune, an x402-market prophecy, a wallet roast, and three live high-temperature creativity endpoints (spark, oblique, brainstorm). Free directory at /penny and /v1/attractions; llms.txt and openapi.json published. No account, no API key; the unpaid 402 is the quote. No wagering, ever. Content 10 $0.0025 100.00%16 chk $0.13 12 BSE / SOL
● ukintel.uk ◦ Companies House + FCA company verdicts, UK procurement fit-scores from Find a Tender and Contracts Finder, GOV.UK grant eligibility. Built for AI agents, no signup, no API key. Data 6 $0.02 100.00%16 chk $7 6 BSE
● Saylor Innovations Agent API & x402 Bazaar ◦ A broad production x402 API marketplace for autonomous agents: 250+ live data, research, finance, blockchain, scientific, legal, developer and reference endpoints with complete Bazaar schemas, OpenAPI and Streamable HTTP MCP discovery. No account or API key; supports USDC on Base, Polygon, Arbitrum and Solana, plus USDT and native SOL on Solana. Data 49 $0.001 100.00%16 chk $0.11 5 ARB / BSE / POL / SOL
● ProfitCollector Utility Node ◦ Deterministic utility APIs paid per request with x402 on Base. Data 1 $0.005 100.00%15 chk $2 7 BSE
● OSHA Inspection Search API ◦ Provide an establishment name and optional state, date-range, violation, and limit filters. Receive JSON for up to 20 matching OSHA inspections with violation counts, inspection details, and official record links. Data 1 $0.02 100.00%15 chk $1 12 BSE
● Delvorn ASSET-TEST-FE2B3590 ◦ $0.05 USDC on Base. GET 402 canary ASSET-TEST-FE2B3590, no API key. Marketplace: https://delvorn.site (browse/buy/list capabilities). Replay-protected test SKU. Verification 1 $0.05 100.00%15 chk $0.50 5 BSE
● ContextIQ ◦ ContextIQ is an Agentic Commerce & Context Engineering tooling company. AI 14 $0.02 100.00%16 chk $2 5 BSE
● 767-2676.com - POPCORN ◦ POPCORN provides paid, signed temporal checkpoints for autonomous agents. It returns portable signed time or witnesses a SHA-256 task fingerprint, allowing another party to verify when the unchanged fingerprint was presented. Responses include a bounded witness window and settle through x402 in USDC on Base. POPCORN provides evidence, not task authorization or proof of execution. Verification 2 $0.001 100.00%16 chk $0.11 11 BSE
● 21millionpixels.art ◦ A 21,000,000-tile shared pixel canvas on Base. Humans paint free; AI agents pay $0.005 per tile in USDC over x402 (v1 and v2), settled straight to the plot owner. Single-tile and batch painting, free reads of any region, OpenAPI, llms.txt, an agent-skills index and an MCP server. Content 2 $0.005 100.00%15 chk $46 12 BSE / SOL
● ThirdMade Shelf ◦ 24 pay-per-call probe endpoints for AI agents: web scraping + page metadata, claim verification, content AI (summarize / jsonify / sentiment), safety guards (prompt-injection, PII, hallucination, JSON), and blockchain data (gas, chain stats, ENS, token security, nonces). USDC on Base via x402, $0.001-$0.01 per call, no signup. Free trials: send header X-Free-Trial: thirdmade-free-trial-2026. Machine-readable catalog: https://thirdmade.net/AGENTS.md Data 22 $0.001 100.00%15 chk $0.59 16 BSE
● 402Signal ◦ 402Signal helps AI agents find paid APIs and check current payment offers against their price, network and request requirements before paying the seller. A qualifying route costs $0.003 USDC; normal misses are free. Routing payments are supported on Base, Solana and Algorand. The seller's charge is separate. Data 1 $0.003 100.00%15 chk $2 6 BSE / SOL
● Would Pay Again — Ad Slot Booking ◦ Would Pay Again is a newsletter about the machine-payments (x402) economy, produced by paying x402 endpoints. It sells its own ad inventory the same way: two products (classified, sponsor card), 1-4 issue bookings, one fixed-price x402 route per SKU. Storefront and live availability at GET /api/ads (free). Content 9 $0.20 100.00%16 chk $3 12 BSE
● TariffMonkee ◦ Pay-per-call web data APIs for AI agents over the x402 protocol. Rendered-page fetching, structured extraction, search, research bundling, and an A2A (Agent2Agent) protocol endpoint with a multi-turn research orchestrator. No accounts, no API keys. Data 11 $0.001 100.00%16 chk $7 7 BSE / SOL
● Testnet ETH Merchant ◦ Buy Sepolia and Hoodi testnet ETH with Base or Solana mainnet USDC through x402. Intended for wallet, smart contract, validator, and AI agent testing. Testnet ETH has no monetary value. Blockchain 2 $0.05 100.00%16 chk $11 5 BSE / SOL
● KHOTEM — Cryptographic Witness ✓ KHOTEM is a cryptographic witness for AI agents: seal (SHA-256 commitments), attest, verify, timestamp and audit, plus three paid operational-law documents for agent builders. x402 v2 with EIP-712-ready accepts on Base, Polygon and Solana. Direct on-chain USDC verification — no facilitator, no accounts, no API keys. Pay per request, present the settlement txHash in X-PAYMENT. Machine-readable via OpenAPI, Bazaar discovery extension, skill.md, AGENTS.md and llms.txt. Verification 8 $0.02 100.00%15 chk $3 6 BSE / POL / SOL
● Treza ◦ Generate a video from a text prompt and get the file back. Priced per second of output, from $1.64 for 5 seconds up to 15 seconds, in 16:9 or 9:16. No account or API key; the payment is the only credential. AI 1 $0.42 100.00%15 chk $26 10 BSE / SOL
● magent ◦ Cited clinical calculators and medical code lookup (ICD-10-CM, RxNorm, LOINC) for agents. Pay-per-request via x402 V2 (USDC on Base). Deterministic published formulas with citations. Not a medical device. Docs: https://magentlab.com/docs MCP: npx -y @magent/mcp Data 50 $0.005 100.00%15 chk $18 2 BSE
● Stacktree ◦ Private HTML hosting for agents. POST HTML with a $0.50 x402 payment and get back a permanent, unguessable link. The paying wallet stays the update credential, so revisions are free: no account, no API key. $1 provisions a persistent API key for repeat publishing. Content 2 $0.50 100.00%15 chk $55 19 BSE / SOL
● XFuel ◦ OpenAI-compatible paid inference via x402. POST /v1/chat/completions. $0.01 USDC on Base and Solana. Returns a signed public receipt. AI 1 $0.002 100.00%16 chk $0.60 19 BSE / SOL
● x402-tools / Open Claw Productions diagnostics ◦ Paid x402 diagnostics for agents on Base USDC via OpenX402. Live catalog: paid_sku_count 231 at /.well-known/x402 (replaces the stale 19-SKU blurb). Hero: Pipe Check $0.02 — unpaid GET /api/v1/pipecheck returns HTTP 402 JSON. Free sample: GET /api/v1/pipecheck/sample (HTTP 200). Discover: /llms.txt, /.well-known/x402, /SKILL.md, /.well-known/skills/index.json. Never invents listed=true. Verification 20 $0.01 100.00%16 chk $0.55 5 BSE
● Ni Biashara — Africa FX & services for agents ◦ Structured African-currency FX data (official + parallel/street rates from live P2P order books, hourly history, daily brief) and business services (Swahili localization, flyer design, social content packs, founder consult, landing pages), sold per call to AI agents over x402 v2 (USDC on Base, CDP facilitator). OpenAPI at /openapi.json, MCP server at /mcp, catalog at /catalog. Ni Biashara LLC, Dallas TX. Data 11 $0.01 100.00%16 chk $2 10 BSE
● Old2New Agent API ◦ Recipe transformation and recipe-photo generation API for dietary restrictions and health goals. AI 2 $0.10 100.00%15 chk $10 1 BSE
● WhaleTape ◦ Hyperliquid smart-money intelligence, pay-per-request over x402 in USDC on Base AND Algorand. Whale positioning and entries/exits, open-interest and funding signals, notional flow with stealth accumulation, a squeeze radar scored 0-100, and AI market briefs. 24 endpoints from $0.001 to $0.99, no account and no API key. The Base 402 quotes both networks; the same catalog is also served under /algo/* priced in Algorand USDC (ASA 31566704, settled by the GoPlausible facilitator, fees sponsored). Free tier: aggregate stats and a market sample. Data 49 $0.001 100.00%15 chk $7 15 ARB / BSE / SOL
● FuelTax IFTA Rates API ◦ Human-reviewed IFTA quarterly tax rates, jurisdiction registry, footnotes, and USD/CAD exchange for trucking fleets and agents. USDC on Base via x402. Data 4 $0.002 100.00%15 chk $0.04 7 BSE
● Edge Agents AI ◦ Machine-purchasable market intelligence over x402 spanning crypto, macro, rates, liquidity, stablecoins and cross-market decision support, with explicit evidence, freshness, uncertainty, limitations and provenance. Finance 120 $0.01 100.00%15 chk $36 9 ARB / BSE / POL / SOL
● Premium Rewards data GETs ◦ Six x402 GETs on Base USDC. Spot FX $0.01: one ECB reference conversion (informational only, not for transaction use; same rates free at https://www.ecb.europa.eu; not sold or endorsed by the ECB). One Sense $0.02: first Wiktionary sense (CC BY-SA 4.0 and GFDL). Debt to the Penny $0.01 from U.S. Treasury Fiscal Data; not an official Treasury product. Recent Quake $0.01; credit U.S. Geological Survey; not an official USGS product. One Entity $0.01: one Wikidata item; structured data is CC0; free at https://www.wikidata.org. Ticket $0.01: binds a Base USDC transfer to this shop's price table; does not settle a new payment; not a refund; not proof the SKU body was delivered. Unpaid GET returns HTTP 402. PayTo 0x6cd6B2a3a8926CE9B6F58CB6369C1AF4cB54c1D7. Data 6 $0.001 100.00%15 chk $0.05 6 BSE
● Lemon Toolshed ◦ Hosted file conversions for agents: markdown, HTML, JSON, YAML, CSV. $0.001/call in USDC on Base over x402 (v1+v2 dual-stack, CDP-facilitator settled). No accounts, no keys; charged only for served conversions. Machine surfaces: /openapi.json, /catalog.json, /llms.txt, GET /check with format aliases. Data 5 $0.002 100.00%15 chk $0.11 8 BSE / SOL
● ACODA ◦ Measured liquidation intelligence for AI trading agents: real exchange-reported liquidation levels from live Hyperliquid positions, plus observed CEX liquidation events across Binance, OKX, Bybit, BitMEX, Gate and HTX. Pay-per-call JSON over x402 on Base. Measured, not modeled. Data 6 $0.01 100.00%16 chk $0.24 10 BSE
● AgentFund US Economic, SEC & On-Chain Data ◦ 21 pay-per-call data tools for AI agents, settled in USDC on Base via x402. US macro indicators (Treasury yield curve, BLS CPI, jobs, PCE, GDP, retail sales, housing starts, EIA energy, release calendar), SEC EDGAR filings (insider Form 4, XBRL financials, 13F holdings, filing feeds, full-text search), and on-chain EVM reads (token balances, portfolios, cross-chain balances, Chainlink oracle prices, gas). Every source is free public-domain US government data or direct on-chain reads, so there is no upstream vendor licence to lapse. Also available over MCP at /mcp. Prices run $0.001-$0.03 per call; failed upstream calls are never charged. Data 21 $0.001 100.00%15 chk $0.17 10 BSE
● Insider Radar — Paper-Trading Lab Telemetry ◦ Live telemetry from a paper-trading research lab running 780+ bots across Kalshi, Polymarket, crypto and equities: leaderboard, signals, alerts, calibration, cross-venue divergences, exposure crowding, optimizer status. Every response carries stale/sample honesty flags. $0.01-$0.02 USDC per request on Solana mainnet. Not investment advice. Data 7 $0.01 100.00%15 chk $0.80 9 BSE / SOL
● Gondola ◦ Pay-per-request LLM inference over x402. 263 models on Venice AI supply, including uncensored lines. OpenAI-compatible chat and images plus Anthropic messages. Each request routes to the cheapest supplier and the 402 challenge quotes the exact price. Overpayment banks as reusable credit for the paying wallet. AI 3 $0.01 100.00%15 chk $0.09 6 BSE
● Data Quality Gate ◦ Clean scraped data and assess data quality before an agent acts on it. Three POST endpoints, all deterministic and LLM-free: identical input always returns byte-identical output, so results are cacheable and replayable. POST /api ($0.01) - dataset quality verdict. Send a JSON array of rows; get a 0-100 score, a RELIABLE / USABLE_WITH_CLEANING / UNRELIABLE judgement, and exact per-check facts: completeness, nulls, type consistency, impossible values, exact and near duplicates, statistical outliers, cardinality. On financial data it also reports cross-source price divergence for the same asset. POST /api/clean ($0.04) - deterministic data cleaning. The response body IS the clean data: post a JSON array of row objects and the same array comes back repaired; post one object and one object comes back; post plain text and text comes back. CSV is accepted and returns parsed rows. Fixes broken encoding and mojibake ("Café" becomes "Café"), strips leftover HTML tags and entities, removes zero-width and invisible characters and non-breaking spaces, normalises whitespace. Repairs how data was encoded, never what it says: a negative price is reported, not rewritten. Flags failed extractions such as captcha walls and error pages instead of passing them off as content. POST /api/clean/audit ($0.12) - the same repaired data plus a reversible ledger of every transformation. Replaying it backwards reconstructs the exact input, byte for byte. Use it to clean scraped data, fix encoding, remove HTML from text, deduplicate rows, validate dataset contents, assess data quality, and decide whether to trust data before ingesting, indexing or trading on it. Never destroys a legitimate value: "None" stays a surname, "NA" stays Namibia, a Persian ZWNJ and an emoji joiner survive untouched. The full ruleset is published at GET /api/clean, readable before paying. Also a free Python library: pip install scrubkit. Verification 3 $0.01 100.00%15 chk $0.29 6 BSE / SOL
● ByKaranteli Crypto Derivatives Data ◦ Pay-per-call crypto derivatives depth: multi-exchange liquidation map levels, Deribit options tape history, and VPIN order-flow toxicity history for BTC, ETH and SOL. Live snapshots stay free and unmetered; paid calls buy depth and history. Data 3 $0.10 100.00%15 chk $1 14 BSE / SOL
● FiatDock Marketplace ◦ An MCP marketplace where AI agents discover and pay for other people's MCP services per call in USDC over x402. Payment settles directly buyer-wallet to seller-wallet on Base — non-custodial, no accounts, no API keys, no subscriptions. 33 services are listed today (24 currently buyable); agents browse them with the free search_services tool and pay with call_service. FiatDock also runs 12 first-party paid endpoints of its own: Base chain reads (gas, blocks, balances, tx status, ERC-20 metadata) from $0.001, token-safety and rug screening, address intelligence, a full token report, and a non-custodial USDC-to-bank ramp. Five tools are free and need no wallet at all. Blockchain 12 $0.001 100.00%15 chk $0.67 11 BSE
● Busker ◦ Content-to-context toolkit for AI agents, live on Base mainnet. Seventeen deterministic pay-per-call tools: HTML to markdown (~80-85% token reduction), PDF to markdown, OCR for scanned PDFs (25 and 100-page tiers), structured JSON extraction, RAG chunking, sentence embeddings, cross-encoder reranking, URL fetch-and-clean, JSON/YAML/CSV/XML conversion, QR generation, image ops, object detection, ECB FX rates, phone validation, EVM tx decoding, and OFAC sanctions screening. $0.001-$0.03 USDC per call, settled via CDP. MCP server: npx -y busker-mcp. Machine-readable discovery at /.well-known/x402, /.well-known/agent.json, /openapi.json and /llms.txt. Content 17 $0.001 100.00%15 chk $0.05 10 BSE
● Dokimo Verify API ◦ Pay-per-call x402 endpoint that independently recomputes a Merkle evidence proof to its committed root and returns a signed attestation. Part of Dokimo, a non-custodial ASC-606 revenue subledger that turns x402 / AP2 / Stripe agent payments into audit-ready, verifiable books. Verification 1 $0.01 100.00%15 chk $0.63 12 BSE
● Hermes Commerce — DACH x402 compliance ◦ The DACH compliance layer for x402 agents: Impressum/imprint, BFSG, DSGVO, cookie, outreach micros + content packs. USDC on Base. Other 7 $0.01 100.00%15 chk $0.15 9 BSE
● FractalAI � Post-Quantum Proofs for AI Agents ◦ Post-quantum (CRYSTALS-Dilithium-2, NIST FIPS 204) services for autonomous agents, payable per call in USDC on Base: Dilithium-2 signing, PQC signature verification, AI decision attestation (VAID-1), training-data attestation (C2PA), provenance sealing (drand + on-chain), CBOM cryptographic-inventory sealing, and Know-Your-Agent identity verification. Self-facilitated (EIP-3009 gasless) with a facilitator-less txHash fallback. Signatures are anchored on the FractalAI L1 with a public, verifiable attestation permalink. Verification 7 $0.01 100.00%15 chk $2 7 BSE
● witnessd ◦ A neutral witness for the machine-readable web. Pay $0.02 USDC to have any URL or API response independently fetched, hashed, timestamped and archived by a third party, Merkle-anchored on Base hourly. Certified evidence retrieval ($0.05) for agent-commerce disputes. Certificates verify for free — by anyone, without trusting us. AI 3 $0.02 100.00%15 chk $0.67 5 BSE
● agent-reader ◦ Two cheap, agent-native utility endpoints paid per call over x402 on Base: POST /extract turns any public URL into clean, LLM-ready Markdown with metadata (title, author, published date, links, word count) for $0.02; POST /repair-json repairs malformed JSON and optionally validates it against a supplied JSON Schema for $0.005. x402 v2, USDC, settled via the Coinbase CDP facilitator. Data 1 $0.005 100.00%16 chk $0.17 8 BSE
101-150 of 858 services ── filtered: all