eip155:1329
610 resources accept payment on this network.
Atomically increment (or decrement) a numeric key and return the new v
Atomically increment (or decrement) a numeric key and return the new value - a coordination primitive for counters, locks, and rate budgets shared across agents. Creates the key at 0 if absent.
Buy one call from an x402 seller endpoint right now and report exactly
Buy one call from an x402 seller endpoint right now and report exactly what happened: the unpaid call's status, the 402 decoded (accepts, chains, payTo, asset, price), whether the accept's EIP-712 domain name matches the token it names (the defect that silently makes a whole catalog unpayable), whether a stock client's signed payment was accepted, the settlement receipt and transaction, a slice of the response body, and the time each leg took. Ends in plain-English flags, never a score.
Latest casts in one or more Farcaster channels (e
Latest casts in one or more Farcaster channels (e.g. base, farcaster, ethereum), newest first, with optional replies. Compact cast shape with author, reactions, reply count and embed URLs. Cached 60 s per identical request. Use to watch a community, sample what builders are posting, or feed a digest.
A Farcaster user's recent casts by fid or username, newest first, opti
A Farcaster user's recent casts by fid or username, newest first, optionally including replies or limited to one channel. Compact cast shape with reactions, reply count and embed URLs. Use to read what a founder, builder or KOL has been posting, or to build a per-account timeline.
Deterministic preflight check for a proposed AI agent action - a tool
Deterministic preflight check for a proposed AI agent action - a tool call, payment, fetch, or write - before it executes. Evaluates up to four independent checks (prompt-injection scan on action text/untrusted text, URL/hostname validation, a bounded JSON-schema check on a payload, and a spend proposal against a spend mandate) and returns ALLOW, REVIEW, or BLOCK with stable reason codes plus a SHA-256 request/receipt hash pair.
Current effective federal funds rate plus a trailing N-day series
Current effective federal funds rate plus a trailing N-day series. Source: FRED DFF (Board of Governors). ?days=30 (1-365, default 30).
Latest average interest rates the US Treasury is paying by security ty
Latest average interest rates the US Treasury is paying by security type (Bills, Notes, Bonds, TIPS, FRNs, marketable vs non-marketable). Public domain, no key. No params - returns the most recent reporting month.
Global crypto market snapshot: total market cap, total 24h volume, BTC
Global crypto market snapshot: total market cap, total 24h volume, BTC dominance, ETH dominance, active coin count, active exchange count, and 24h market-cap change %. Returned in a chosen vs_currency (default usd). Backed by CoinGecko /global.
The table + column schema for the onchain-sql tool - every queryable t
The table + column schema for the onchain-sql tool - every queryable table (base.events, base.transactions, base.blocks, base.decoded_user_operations, base.transaction_attributions, solana.instructions, …) with its columns and types. Fetch once, then write SQL with confidence.
Current time: UTC ISO, epoch seconds/ms, day of week/year, ISO week -
Current time: UTC ISO, epoch seconds/ms, day of week/year, ISO week - optionally rendered in any IANA timezone via ?tz=.
Tamper-evident history of every change to a namespace - an append-only
Tamper-evident history of every change to a namespace - an append-only, hash-chained audit log the server attests to (provenance an agent can't forge for itself). ?owner=0x… reads a granted namespace.
Trending coins on CoinGecko in the last 24 hours, ranked by user searc
Trending coins on CoinGecko in the last 24 hours, ranked by user search activity on the site (currently ~15 results). Includes coin id, symbol, market cap rank, current price (BTC-denominated), and score. Useful signal for detecting narrative shifts before they hit price charts.
Most recent total US public debt outstanding (the headline national-de
Most recent total US public debt outstanding (the headline national-debt number, daily) from the Treasury "Debt to the Penny" feed. Public domain, no key. No params.
Header-level detail for one block on Ethereum, Base, Polygon, Arbitrum
Header-level detail for one block on Ethereum, Base, Polygon, Arbitrum, or Optimism: hash, timestamp (unix + ISO), transaction count, gas used/limit, base fee. Pass a block number, 0x hex, or "latest". Keyless multi-endpoint failover. ?block=latest&network=base
Current gas price (gwei and wei) on Base, Polygon, Arbitrum, Optimism,
Current gas price (gwei and wei) on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction. Read-only. ?network=base
One-call chain state snapshot: chain id, latest block number, and curr
One-call chain state snapshot: chain id, latest block number, and current gas price (wei + gwei) for Ethereum, Base, Polygon, Arbitrum, or Optimism. Keyless multi-endpoint failover. ?network=base
Count exact LLM tokens for a string using the real OpenAI BPE (o200k_b
Count exact LLM tokens for a string using the real OpenAI BPE (o200k_base for gpt-4o/o-series, cl100k_base for gpt-4/gpt-3.5). Deterministic, offline - budget context windows without calling a model.
Transcribe audio to text using OpenAI (gpt-transcribe)
Transcribe audio to text using OpenAI (gpt-transcribe). Provide a URL to an audio file (mp3, wav, m4a, etc.) and get back the transcript. No API key needed; pay per call via x402. Max 4 minutes of audio, 25 MB file size; /api/transcribe-pro takes the same model to 10 minutes.
Daily FX rates between two currencies across a date window using Europ
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter). ?from=USD&to=EUR&startDate=2024-01-02&endDate=2024-01-31
Read one known URL: the main article content as clean markdown with ti
Read one known URL: the main article content as clean markdown with title, byline, excerpt and word count, boilerplate removed. Use it when an agent already has a URL and needs the text; for JavaScript-rendered pages that return an empty shell, use a browser render instead.
Fetch the verified Solidity source files and compiler metadata for a c
Fetch the verified Solidity source files and compiler metadata for a contract address from Sourcify's open verification repository. Covers 8 EVM mainnets (ethereum, base, polygon, arbitrum, optimism, bsc, gnosis, celo). Contracts that were never verified return a structured {verified:false} miss, not an error. Feed the returned source into /api/solidity-scan for a heuristic pattern check.
Full-text search across FRED's ~800,000 economic time series
Full-text search across FRED's ~800,000 economic time series. Returns series IDs (use with /api/fred-series), titles, frequency, units, and a popularity score. ?q=unemployment+rate&limit=10 This product uses the FRED(R) API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
Recently deployed B20 tokens on Base: scans the factory's B20Created l
Recently deployed B20 tokens on Base: scans the factory's B20Created logs over a block window, locates each new token by its 0xB200 address prefix, and enriches it with live name/symbol/decimals eth_calls. ?blocks=50000&limit=25