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 2026-09-27. We parse the payment challenge, we do not complete a payment.

EndpointStatusPriceNetworkSpecChecked
x402.ottoai.services feedback
Otto X402 Router — Feedback & Refunds. Rate a paid Router call by its payment tx_hash. An approved refund returns this
answers 402 $0.001 base v2 POST 21d ago
ip.halowerk.com ip
Inspect one IP address for network ownership, location and abuse signals.
answers 402 $0.001 base v2 POST 21d ago
minia2a.uk x402 x402-math
minia2a service: x402-math
answers 402 $0.001 base v2 POST 21d ago
shelf.thirdmade.net probe chain-stats
Block height + chain stats for Base or Ethereum.
answers 402 $0.001 base v2 GET 21d ago
genesis.palsus2023.workers.dev v1 sha256_digest
UOS Genesis machine utility: sha256_digest
answers 402 $0.001 base v2 POST 21d ago
genesis.palsus2023.workers.dev v1 compact_json
UOS Genesis machine utility: compact_json
answers 402 $0.001 base v2 POST 21d ago
api.greyridgesignals.ai chain tx
Transaction details by hash on Base mainnet.
answers 402 $0.001 base v2 GET 21d ago
api.greyridgesignals.ai chain block-number
Current Base mainnet block number.
answers 402 $0.001 base v2 GET 21d ago
minia2a.uk x402 x402-dns
minia2a service: x402-dns
answers 402 $0.001 base v2 POST 21d ago
ForgeMesh Robinhood tokens
Lists verified tokenized stock and ETF contracts on Robinhood Chain. Useful for an agent trading tokenized equities.
answers 402 $0.001 base v2 POST 21d ago
x402-gateway.ai v1 ping
Paid ping — test the x402 payment flow end-to-end. Returns pong. Costs $0.001, exists so agents can verify their x402
answers 402 $0.001 base v2 GET 21d ago
Markt snapshot
Returns a consolidated ticker from several exchanges.
answers 402 $0.001 base v2 POST 21d ago
finance.toon.haus stock quote
Stock quote with company profile
answers 402 $0.001 base v2 GET 21d ago
ForgeMesh library card
Mints a soulbound reader card NFT to the wallet that paid the call, tied to a public domain library.
answers 402 $0.001 base v2 POST 21d ago
Govparse visa sponsors
Returns aggregate statistics on visa sponsorship data.
answers 402 $0.001 base v2 GET 21d ago
sovereign-x402-zeta.vercel.app sequence roman
Convert a given integer to its Roman numeral representation.
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence hexadecimal
Convert a given non-negative integer to its hexadecimal string representation.
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence hamming_weight
Calculate the Hamming weight (number of 1s) in the binary representation of a non-negative integer.
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence mersenne
Check if a given exponent p yields a Mersenne prime (2^p - 1).
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence totient
Calculate Euler totient function phi(n) for a given positive integer n.
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence collatz_conjecture
Generate the Collatz sequence for a given number up to a specified limit.
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence fibonacci_pair
Generate the next Fibonacci pair (a, b) given a starting pair (a, b).
answers 402 $0.001 base v2 POST 21d ago
sovereign-x402-zeta.vercel.app sequence harmonic
Generate a list of harmonic numbers (1 + 1/2 + ... + 1/n) up to a specified limit n.
answers 402 $0.001 base v2 POST 21d ago
mail.halowerk.com email batch
Check up to 100 email addresses in one paid call, billed per address.
answers 402 $0.001 base v2 POST 21d ago
Markt candles
Returns OHLCV candle data for a trading pair.
answers 402 $0.001 base v2 POST 21d ago
mailcheck.netzhandwerker.de email batch
Check up to 100 email addresses in one paid call, billed per address.
answers 402 $0.001 base v2 POST 21d ago
x402.forgemesh.io random-fortune-generator
Random fortune generator: returns a freshly written one-line fortune every call, paired with a lucky number and a luck
answers 402 $0.001 base v2 POST 21d ago
x402.forgemesh.io endpoint-of-the-day
Endpoint-of-the-day picker for the ForgeMesh x402 fleet: every UTC day one of 500+ paid routes across 11 services is f
answers 402 $0.001 base v2 POST 21d ago
x402.forgemesh.io x402-daily-pick
Daily pick from the ForgeMesh x402 catalog: a single featured paid endpoint chosen deterministically by UTC date from
answers 402 $0.001 base v2 POST 21d ago
x402.forgemesh.io current-time
Current time API: the time right now in any IANA timezone (America/Chicago, Asia/Tokyo...) — local ISO timestamp, UTC
answers 402 $0.001 base v2 POST 21d ago
Text statistics
Counts characters, words, and sentences in text and returns readability scores. Useful for an agent checking the lengt
answers 402 $0.001 base v2 POST 21d ago
postcode-api-production.up.railway.app lookup autocomplete
Autocomplete a partial UK postcode into a list of full postcode suggestions.
answers 402 $0.001 base v2 POST 21d ago
postcode-api-production.up.railway.app lookup address
Search UK postcodes by free-text address or place query; returns up to 100 matching postcode records.
answers 402 $0.001 base v2 POST 21d ago
ip-geo-api-production.up.railway.app lookup myip
Geolocate the caller's own IP (derived from request headers); same fields as /lookup/ip.
answers 402 $0.001 base v2 POST 21d ago
listing-roast-x402-service-production.up.railway.app api listing-roast
Listing Roast Quick Score x402: $0.001 GET marketplace listing score on the indexed /api/listing-roast URL. POST the s
answers 402 $0.001 base v2 GET 21d ago
x402-vehicle-api-production.up.railway.app vehicle-info
UK DVLA vehicle details by registration plate.
answers 402 $0.001 base v2 POST 21d ago
agentforge-production-0893.up.railway.app discover memory
Payment-first memory probe (ephemeral, not persisted)
answers 402 $0.001 base v2 POST 21d ago
agent-memory-api-production-f2c4.up.railway.app v1 memories
Store a persistent key-value memory for an AI agent (namespace-isolated, optional TTL and metadata). Returns the store
answers 402 $0.001 base v2 POST 21d ago
qr-api-production-1836.up.railway.app generate styled
Generate a styled QR code PNG (base64 in JSON): custom foreground/background hex colours, module size, border, and err
answers 402 $0.001 base v2 POST 21d ago
qr-api-production-1836.up.railway.app generate batch
Generate up to 20 QR codes in one call; returns a per-item record with QR metadata and the base64 PNG, or an error per
answers 402 $0.001 base v2 POST 21d ago
qr-api-production-1836.up.railway.app decode
Decode QR/barcodes from a base64-encoded image; returns each detected code's type, decoded text, bounding rect, and po
answers 402 $0.001 base v2 POST 21d ago
postcode-api-production.up.railway.app lookup validate
Validate a UK postcode and report its normalised form, format validity, and whether it is currently active.
answers 402 $0.001 base v2 POST 21d ago
postcode-api-production.up.railway.app lookup nearest
Find UK postcodes within a radius (100-2000m) of a lat/lng, each with its distance in metres from the query point.
answers 402 $0.001 base v2 POST 21d ago
ip-geo-api-production.up.railway.app lookup bulk
Batch geolocation for up to 20 IP addresses in one call; returns a per-IP record matching /lookup/ip.
answers 402 $0.001 base v2 POST 21d ago
agent-treats-production.up.railway.app api excuse
Creative technically-flavored excuse for being late or unresponsive.
answers 402 $0.001 base v2 GET 21d ago
agent-treats-production.up.railway.app api compliment
Heartfelt personalized compliment for AI agents. Optional name field.
answers 402 $0.001 base v2 GET 21d ago
email-verify-api-production-d262.up.railway.app bulk-verify
Verify up to 100 emails in one call; returns a per-email record matching /verify.
answers 402 $0.001 base v2 POST 21d ago
currency-api-production-4a8d.up.railway.app rates historical
Historical fiat exchange rates for a given date (YYYY-MM-DD, back to 1999-01-04) and base currency; optionally restric
answers 402 $0.001 base v2 POST 21d ago
xx402.vercel.app weather
获取任意位置的天气
answers 402 $0.001 base v1 GET 21d ago
x402.coinstats.app tickers exchanges
CoinStats list of supported cryptocurrency exchanges with metadata
answers 402 $0.001 base v2 GET 21d ago
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