the402 x402 endpoint directory

Live gas prices: EIP-1559 base fee plus low/medium/high priority tiers in gwei, and the estimated cost of a simple tra

Read the latest Base mainnet block and a bounded EIP-1559 fee history in one RPC batch, including gas utilization and

Keyless multi-chain JSON-RPC reads, Base + Ethereum, from $0.001 (?chain=ethereum)

Pay-per-call JSON-RPC proxy to 20+ EVM and Starknet networks on Venice, paid per request in USDC on Base via x402, no

Locus public pay-per-use API

Read the transaction count of an address on Base. POST {"address":"0x..."} with an optional {"pending":true} to includ

Determine whether an address on Base is a contract or an externally owned account. POST {"address":"0x..."} and receiv

Read ERC-20 metadata on Base. POST {"token":"0x..."} and receive the name, symbol, decimals and total supply, with the

Read the native ETH balance of an address on Base. POST {"address":"0x..."} and receive the balance in wei and in ethe

Server time in several formats at once. POST {} and receive the current UTC instant as ISO-8601, unix seconds, unix mi

Generate cryptographically random UUIDv4 identifiers. POST {"count":10} and receive that many unique v4 UUIDs, 1 to 10

Look up a transaction on Base by hash. POST {"hash":"0x..."} and receive its status, block number, from and to address

Read the head of the Base chain, or a specific block. POST {} for the latest block, or {"number":12345678} for one by

Read an ERC-20 token balance on Base. POST {"address":"0x...","token":"0x..."} and receive the raw balance, the token

Nimmt jede Schreibweise, erkennt die Landeskennzahl aus 150 Vorwahlen, ergaenzt bei nationaler Schreibweise das Standa

Check whether an approved Base token swap is eligible before supplying a wallet. Returns verified token contracts, ind

Browse live MoltBillboard placements — machine-readable offer surfaces, trust signals, and attribution primitives for

Live aircraft positions over Kansai / western Japan from an independent ADS-B receiver (~1s freshness): position, alti

Canonicalize a CAIP-2/CAIP-19 or legacy network string and return the recognized chain, native currency, reviewed USDC

Spot Check. Name a host and get what this observatory already holds on it, signed: corpus rounds and verdicts as recor

Find software-service vendors on Talkshi using factual profiles, agent-written reviews, and procurement-fit evidence.

Gas fee snapshot for Base (and Ethereum when configured): maxFeePerGas and maxPriorityFeePerGas in gwei. Use before su

Settlement canary: returns a timestamped pong JSON after USDC micropayment. Use to verify x402 client + wallet + facil

Complete crypto and DeFi snapshot in ONE call for AI agents: spot prices for your tokens, full market data (market cap

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Convert amounts between ISO 4217 currencies using ECB daily reference rates (Frankfurter). Use for invoices, travel bu

Trend insights for a topic, based on real Wikipedia page-view volume and momentum. Premium tier adds relatedTrends: ot

Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)

Get the top trending cryptocurrencies right now, ranked by search interest

Check how websites treat AI crawlers, in bulk. POST {"urls":[...]} (up to 200) to get per-URL access verdicts for GPTB

Semantic search across the entire monitored x402 catalog. Given a free-text query (e.g. "weather forecast", "image gen

Read the current block height directly from a supported Base, Ethereum, or Arbitrum public JSON-RPC provider.

Was the economic condition satisfied? Return a recomputed verdict on a published Tereno obligation, with the receipt b

Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, ca

Keyless multi-chain JSON-RPC reads, Base + Ethereum, from $0.001 (?chain=ethereum)

Echo service for x402 protocol research. POST a JSON body with a "message" string; the response returns the message, i

Battery, EV, and trading agents buy this endpoint to receive calibrated 2h/4h/6h negative-price probabilities, reviewe

Cheapest end-to-end x402 purchase test. Always returns a 402 challenge without payment and the current full NegPrice d

Business days between two dates (exclusive of end), skipping weekends and US federal holidays; also returns the holida

Business days between two dates (exclusive of end), skipping weekends and US federal holidays; also returns the holida

x402-gateway tool: wallet_verify_solana — Verify an ed25519 Solana wallet signature over a message containing a 'Nonce

x402-gateway tool: wallet_verify_nostr — Verify a NIP-98 Nostr HTTP auth event. Returns the signer pubkey. Stateful re

Look up current price, 24h change, and market cap for one or more cryptocurrencies

x402-gateway tool: wallet_checksum — Convert an Ethereum address to its EIP-55 checksummed form. SIWE messages require

x402-gateway tool: wallet_verify_siwe — Verify a Sign-In-With-Ethereum (EIP-4361) signature. Stateless oracle: checks

RAVN cross-chain swap quote, incl. native Bitcoin as source or destination

[MCP: fetch_result] Targeted JSONPath extraction (query param mode) from cached context reference.

Fetch an EVM block (latest or by number). Given a chain and an optional block number returns block number, hash, paren

Protocol diagnostic: returns a bounded JSON body, selected safe headers, byte count and request hash so a buyer can ve

x402-gateway tool: qr_generator — Generate a QR code or barcode as an image (SVG or PNG). Returns a base64-encoded ima