the402 x402 endpoint directory

MCP servers, called rather than listed · we called 16,923 of them · search their tools

Every x402 endpoint we can find, each one called to see what it actually answers and what it quotes. Other directories list what providers claim. This one reports what the endpoint did when we asked it, and says plainly where we could not tell.

Last verified 2026-10-13. We parse the payment challenge, we do not complete a payment.

EndpointStatusPriceNetworkSpecChecked
diem-agent-workers.vercel.app jobs text-to-speech
Convert up to 1,000 characters of text into MP3 speech using a bounded private Venice voice model. Use constitutes acc
no payment challenge 10000 atomic - - POST 37d ago
amnt.io slate_heron freelancer-contract-review
Freelancer Contract Review - Scans freelancer contracts for unfair intellectual property clauses, flags high-risk term
no payment challenge 20000 atomic - - POST 37d ago
amnt.io quick_pine solidity-reentrancy-auditor
Solidity Reentrancy Auditor - Automated Solidity audit focused on reentrancy and gas: identifies vulnerable flows, pri
no payment challenge 20000 atomic - - POST 37d ago
amnt.io rapid_panda postgres-query-rewriter
Postgres Query Rewriter - Rewrites complex PostgreSQL JOINs and subqueries into more efficient, semantically equivalen
no payment challenge 20000 atomic - - POST 37d ago
amnt.io lucky_elm cocktail-lookup
Cocktail Lookup - Returns ingredients, measures and step-by-step mixing instructions for a named cocktail from TheCock
no payment challenge 1000 atomic - - POST 37d ago
amnt.io teal_reef encyclopaedia-summary
Encyclopaedia Summary - Concise, plain-English encyclopaedia summaries from Wikipedia: supply an article title and get
no payment challenge 1000 atomic - - POST 37d ago
amnt.io brave_orbit clinical-trials-finder
Clinical Trials Finder - Returns up to five studies from ClinicalTrials.gov matching a condition or drug, each with st
no payment challenge 1000 atomic - - POST 37d ago
amnt.io iron_cinder epss-score-lookup
EPSS Score Lookup - Get the EPSS probability for a CVE — returns the dataset object showing the estimated exploit like
no payment challenge 1000 atomic - - POST 37d ago
amnt.io sunny_eagle token-dex-prices
Token DEX Prices - Returns live trading pairs and current prices for any ERC-20 token across supported DEXs using Dexs
no payment challenge 1000 atomic - - POST 37d ago
amnt.io olive_arrow coingecko-price-check
CoinGecko Price Check - Returns the USD spot price for any CoinGecko coin id. Send an id like 'bitcoin' and receive Co
no payment challenge 1000 atomic - - POST 37d ago
amnt.io sunny_tundra npm-latest-version
npm latest version - Fetch the latest version of any npm package by querying the npm registry's /latest endpoint and r
no payment challenge 1000 atomic - - POST 37d ago
amnt.io quiet_glacier dns-a-lookup
DNS A lookup - Resolve a domain name to its IPv4 A records using DNS-over-HTTPS (Google DNS) and return the resolver's
no payment challenge 1000 atomic - - POST 37d ago
amnt.io humble_oak drug-label-lookup
Drug Label Lookup - Fetch official FDA drug label warnings and indications from openFDA by brand name, returning the l
no payment challenge 1000 atomic - - POST 37d ago
amnt.io alpine_nebula dns-txt-lookup
DNS TXT Lookup - Fetches DNS TXT records for a domain (including SPF and domain verification strings) via Google DNS-o
no payment challenge 1000 atomic - - POST 37d ago
amnt.io royal_beacon country-info-lookup
Country info lookup - Fetch a country's region, World Bank income level and capital city from the World Bank API by pr
no payment challenge 1000 atomic - - POST 37d ago
amnt.io pearl_finch solana-token-price
Solana Token Price - Fetch price, liquidity and market pair data for a Solana SPL token mint from Dexscreener's token
no payment challenge 1000 atomic - - POST 37d ago
amnt.io violet_cinder bitcoin-fee-rates
Bitcoin Fee Rates - Fetches current recommended Bitcoin transaction fee rates for the next blocks (fastest, half-hour,
no payment challenge 1000 atomic - - POST 37d ago
amnt.io gentle_oak dex-pair-search
DEX Pair Search - Search every supported decentralized exchange (DEX) for trading pairs that match a token name or sym
no payment challenge 1000 atomic - - POST 37d ago
amnt.io keen_cinder coingecko-lookup
CoinGecko lookup - Search CoinGecko for a cryptocurrency by name and return its CoinGecko id, symbol, and market cap r
no payment challenge 1000 atomic - - POST 37d ago
amnt.io solid_sparrow crypto-market-lookup
Crypto Market Lookup - Returns market cap, 24h trading volume and 24h price change for a given cryptocurrency from Coi
no payment challenge 1000 atomic - - POST 37d ago
amnt.io neon_ridge npm-package-scores
npm package scores - Fetches npms.io's quality, popularity, and maintenance scores for a specified npm package name. R
no payment challenge 1000 atomic - - POST 37d ago
amnt.io sunny_echo github-user-lookup
GitHub user lookup - Fetch a GitHub user's public profile and return name, bio, company, follower count and public rep
no payment challenge 1000 atomic - - POST 37d ago
amnt.io lucky_condor rhyme-finder
Rhyme Finder - Quickly fetch up to 20 English words that rhyme with any input word, returned as a JSON list for easy u
no payment challenge 1000 atomic - - POST 37d ago
amnt.io lilac_ibex similar-words-lookup
Similar Words Lookup - Get up to 20 words related in meaning to the input phrase using Datamuse's related-word API; fa
no payment challenge 1000 atomic - - POST 37d ago
amnt.io velvet_heron ethereum-selector-lookup
Ethereum Selector Lookup - Query 4byte.directory for an Ethereum 4-byte function selector and return the array of matc
no payment challenge 1000 atomic - - POST 37d ago
amnt.io warm_comet github-organization-lookup
GitHub Organization Lookup - Fetches a GitHub organization's public profile and returns its public repository count (p
no payment challenge 1000 atomic - - POST 37d ago
amnt.io teal_cedar bitcoin-block-height
Bitcoin Block Height - Query Blockstream's public API to return the current Bitcoin block height (numeric tip). Fast,
no payment challenge 1000 atomic - - POST 37d ago
amnt.io bright_panda cve-exploit-rank
CVE Exploit Rank - Get an EPSS-based ranking and probability for any CVE, showing how its exploitation likelihood comp
no payment challenge 1000 atomic - - POST 37d ago
amnt.io amnt product-headline-generator
Product Headline Generator - Turn a product URL into three short, punchy ad headlines optimized for clicks and clarity
no payment challenge 50000 atomic - - POST 37d ago
amnt.io olive_orbit json-to-typescript
JSON to TypeScript - Convert JSON into idiomatic TypeScript types and interfaces with inferred optional fields, unions
no payment challenge 20000 atomic - - POST 37d ago
amnt.io solid_stag crypto-invoice
Crypto Invoice - Generate structured, ready-to-send crypto payment requests for USDC, ETH or BTC from a job descriptio
no payment challenge 20000 atomic - - POST 37d ago
agents.ai-rook.com api email-validate
Email validation — syntax check plus live MX record DNS lookup to confirm deliverability.
needs params 1000 atomic - - POST 37d ago
agents.ai-rook.com api qr-generate
Generate a QR code from any text or URL. Returns base64-encoded PNG.
needs params 1000 atomic - - POST 37d ago
agents.ai-rook.com api ip-lookup
IP geolocation, ASN, and proxy/VPN detection. Pass ?ip=x.x.x.x or omit for caller IP.
no charge 1000 atomic - - GET 37d ago
api.speccy.cloud web search
Web search via Tavily. Returns top N results with URL, title, content snippet, score.
no payment challenge 5000 atomic - - POST 37d ago
21millionpixels.art agent paint
Paint one pixel on 21millionpixels.art, a shared 21,000,000-pixel canvas. Reads are free; paid pixels skip the human c
no payment challenge 5000 atomic - - POST 37d ago
blockrun.ai wallet cluster
Discover wallets connected to a seed address via on-chain transfers and identity proofs
not probed 8500 atomic - - never
derivatives-pricer-production.up.railway.app option price
When to use: you already have model inputs (S or forward mark, K, T, r, σ) and need fair value + hedge ratios — not ma
answers 402 10000 atomic solana v2 POST 37d ago
diem-agent-workers.vercel.app jobs generate-draft-image
Generate one safe-mode 1024px WebP draft image from a bounded prompt, with search and prompt enhancement disabled. Use
no payment challenge 20000 atomic - - POST 37d ago
diem-agent-workers.vercel.app jobs summarize-text
Summarize bounded source text into a structured abstract and key points without web access or invented facts. Use cons
no payment challenge 20000 atomic - - POST 37d ago
api.socialfetch.dev instagram profiles
Get a full Instagram profile by handle (bio, counts, and related fields).
not probed 14000 atomic - - never
animica.dev chat completions
OpenAI-compatible chat completions with capacity-gated admission, no per-IP rate limit, direct upstream routing and a
no payment challenge 2828 atomic - - POST 37d ago
wait.edgecasesystems.workers.dev v1 waits
Create one Edgecase Wait entitlement.
no payment challenge 10000 atomic - - POST 37d ago
api.sirenic.eu eu entreprise
European company profile by country code and national ID — official company registry data in one unified JSON schema:
not probed 10000 atomic - - never
quantum-artificer.surewhynot.app chemistry compute
Physical chemistry (Cantera + CoolProp): chemical equilibrium, adiabatic flame temperature, ignition delay, reactor si
needs params 5000 atomic - - POST 37d ago
quantum-artificer.surewhynot.app quantum simulate
Quantum circuit simulation (Qiskit Aer): statevector, density-matrix (noise), stabilizer, and MPS methods; shots, expe
needs params 10000 atomic - - POST 37d ago
quantum-artificer.surewhynot.app math numerical
Numerical computing (SciPy): root-finding, optimization, numerical integration (quadrature), eigenvalues/vectors, and
needs params 3000 atomic - - POST 37d ago
glim.sh users relationship
Check follow relationship
answers 402 1000 atomic solana v2 POST 37d ago
api.tickersfeed.net stock news
Latest financial news headlines for a US stock from the past 7 days — up to 10 articles with headline, summary, source
not probed 5000 atomic - - never
animica.dev mining jobs
Which Animica workloads a machine can earn on, in one poll. Per-kind GPU render supply, with the kinds NOBODY serves f
check failed 5976 atomic - - POST 37d ago
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