Blockchain And Crypto x402 offerings

Six premium x402 endpoints across 5 EVM chains: canonical /v1 routes plus OATP-style /tools/tx_explainer, /tools/tx_simulator, /tools/token_risk_scan aliases for transaction explainer, transaction simulation, pre-signing safety, rug risk, token risk scan, approval risk, balance changes, and 0-100 risk score discovery.

Fetch just the ABI of a verified EVM contract, resolving a proxy to its implementation ABI as well. A cheap slice for when you only need the interface to encode calls or decode data, not the full source. Unverified contracts are reported honestly.

Fetch a verified smart-contract's full source, ABI, compiler settings and NatSpec docs for an EVM address, and automatically resolve a proxy to its implementation so the response also carries the implementation ABI. One call returns everything an audit or integration agent needs to understand the contract, keyless and pay-per-call. Unverified contracts are reported honestly.

Fetch a verified smart-contract's full source, ABI, compiler settings and NatSpec docs for an EVM address, and automatically resolve a proxy to its implementation so the response also carries the implementation ABI. One call returns everything an audit or integration agent needs to understand the contract, keyless and pay-per-call. Unverified contracts are reported honestly.

Reverse a 4-byte function selector, an event topic hash, or raw calldata into its human-readable signature using the 4byte database, with collisions resolved so the real signature (the oldest registered) is returned first and the attacker-registered lookalikes are flagged. Parameter types are parsed out.

Read a contract's recent event logs on an EVM network over a bounded block window and decode them. Logs are decoded from an event signature you supply, or from the contract's verified ABI, or by resolving the topic to a name via 4byte. Raw logs are always returned; decoded fields are added where possible.

List the internal transactions of an EVM transaction: the nested contract calls and their value transfers and call types, via Blockscout. Reveals the value flow and call tree that a plain receipt hides. Rate-limited upstream degrades gracefully rather than erroring.

Use this to be told when a contract you rely on (Base, Robinhood Chain) gets new code, a new owner or weaker upgrade rules, or when a new advisory hits your npm lockfile: 30 days of hourly checks, si…

Use this before approving or depositing into a contract on Base or Robinhood Chain: is it a proxy, who can change its code (single key, Safe with threshold, timelock with delay), who owns it, is the …

Current Base chain ID, block height, gas price, block timestamp, and RPC latency.

Markets (tickers) listed on one exchange: base/target pair, last price, 24h volume, USD- and BTC-converted last price and volume, bid-ask spread %, trust score (green/yellow/red), anomaly and stale flags, trade URL and last trade time. Filter by `coins` (coin ids, max 10); pages of up to 100 tickers (`page`), trimmed to `limit` (default 50). Where is a coin actually trading, at what spread, and is the volume trusted. Cached in-process for 60 seconds. Data provided by CoinGecko.

Returns a CoinGecko exchange volume chart for a selected period.

Scans for potential exploit patterns and suspicious activity in a target or dataset.

Checks whether a target shows signs of exploit risk or compromise.

Bulk extract bitcoin addresses from page: up to 20 urls in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.

Change watch for extract bitcoin addresses from page: runs the check, compares it with the result from your previous call for the same url (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

Extract ethereum addresses from a web page: fetches the URL and returns every ethereum addresses found in the page text and markup (deduplicated, with counts and up to 300 items), so an agent gets the values without parsing HTML. $0.01 per page.

Bulk extract ethereum addresses from page: up to 20 urls in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.

Extract ipv6 from a web page: fetches the URL and returns every ipv6 found in the page text and markup (deduplicated, with counts and up to 300 items), so an agent gets the values without parsing HTML. $0.01 per page.

Extract the page's sentences as csv: fetches the URL, pulls every sentences element and returns them as CSV rows, with a count. Structured, one-element-type extraction for agents and pipelines; no browser needed. $0.01 per page.

Compare current perpetual funding rates across Binance, Bybit, Hyperliquid, and, for single-symbol requests, OKX. Returns interval-normalized annualized rates, gross cross-venue spreads, source status, mark prices when available, and funding timestamps. Optional symbol query; no symbol returns the ten widest current spreads. Market data only, not financial advice.

Compare a spot KRW price for one symbol across Upbit and Bithumb's public, account-free ticker APIs. Required symbol (1-10 letters/digits, uppercase-normalized); optional exchange (all, upbit, or bithumb; default all). Returns per-exchange price, rolling 24h volume and notional, normalized change rate with its exchange-specific basis, and upstream timestamp, plus an absolute/percent spread when both exchanges succeed. At least one requested exchange must return a fresh, well-formed quote or the call fails and does not settle.

The Family Office Knowledge Graph index of record for $0.01 USDC — every node's record list (LEI, legal name, aliases, register ids, field states, as-of) as a signed statement (EdDSA, kid fo-kg-x402-2026-09) with a receipt that resolves forever at /x402/receipt/{nonce}. Operator: Agentic KG Holdings.

Reverse-lookup an Ethereum address to its Farcaster account (via verified address). Returns FID, username, display name, bio, follower/following counts, and Warpcast URL, or found=false if the address has not verified on Farcaster. Use to label wallet activity with the owner's Farcaster identity when ENS is missing.