{"host":"chain.openverbs.com","week":"2026-W44","snapshot_taken_at":"2026-10-26T13:00:11.784122+00:00","summary":{"host":"chain.openverbs.com","listings":27,"score":93,"grade":"A","errors":0,"warnings":24,"calls_30d":158,"payers_30d":57},"confidence":null,"safety":null,"fixes":[{"rule":"output-example-missing","severity":"warning","listings":24,"fix":"Add an output example to the discovery extension.","text":"no output example"}],"market":{"resource":"https://chain.openverbs.com/v1/read-contract","category":"chain_data","label":"On-chain data","price":{"usd":0.006,"compared_with":2127,"p10":0.001,"median":0.005,"p90":0.02,"ask_more":796,"ask_less":1321},"payers":{"payers_30d":3,"rank":1255,"of":12555},"pattern":"repeat_use","search":null,"method":"Compared with the week's Bazaar snapshot: prices from listings in the same category with at least 3 payers in 30 days, other sellers only; payer counts are the Bazaar's own, so catalog sweeps count too. Search ranks come from the week's run of the category's buyer searches, top 20 each."},"who_pays":null,"registered_agent":null,"standing":{"shown":0,"of":4,"checks":[{"signal":"certified","shown":false,"detail":"No Fair Offer certification on record."},{"signal":"block","shown":false,"detail":"No tool here has read one of its offers yet."},{"signal":"receipts","shown":false,"detail":"No public receipts file reconciled in the evidence commons."},{"signal":"probe","shown":false,"detail":"No paid probe on record."}],"certification":"never_certified","block":null,"deliveries_30d":null,"probe":null,"sources_unavailable":{},"note":"What the host has shown, with no usage behind it: each item is read from the log that holds it (certifications, offers the Lab's tools saw, the evidence commons, paid probes). A missing item means nothing is on record, not that the host lacks it."},"live_check":{"week":"2026-W44","at":"2026-10-27T13:00:14.739083+00:00","reachable":true,"status":402,"latency_ms":308,"price_usd":0.006,"pay_to_addresses":1,"block":{"present":false,"valid":false},"problem":null,"security_txt":false,"recheck":false,"sample":[],"tls":null,"uptime":{"weeks":12,"since":"2026-W33","checks":1,"payable":1},"changes":null,"note":"Unpaid requests to the host's busiest listings and one picked at random, and a read of its TLS certificate, made once a week; anyone could make them."},"recheck":{"url":"https://agoranome.com/sellers/chain.openverbs.com/recheck","method":"POST","note":"Free, once a day per seller: the same listings asked again, unpaid, and the grade made from the answers."},"history":[{"week":"2026-W44","taken_at":"2026-10-26T13:00:11.784122+00:00","listings":27,"score":93,"grade":"A","errors":0,"warnings":24,"calls_30d":158,"payers_30d":57}],"evidence":null,"benchmark":null,"listings":[{"resource":"https://chain.openverbs.com/v1/read-contract","description":"Call a read-only (view/pure) function on any deployed contract via eth_call and get the decoded result. Give the contract address and a human-readable signature (e.g. 'balanceOf(address) view returns (uint256)') plus args; include return types to decode outputs, else raw hex is returned. Reads allowances, oracle prices and vault/DAO state. Read-only, no signing. Ethereum, Base, Arbitrum, Optimism, Polygon.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":73,"payers_30d":3,"last_called_at":"2026-10-20T12:53:25.961Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/ens-records","description":"Read an ENS name's address plus its text records (avatar, url, email, description, com.twitter, com.github and more) in one call, live from the resolver on Ethereum mainnet. Pass `keys` to fetch specific records, or omit it for a sensible default set. Only records that are set are returned. Live reads with automatic endpoint fallback.","method":"POST","price_usd":0.002,"networks":["eip155:8453"],"calls_30d":7,"payers_30d":3,"last_called_at":"2026-10-14T21:44:32.802Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/btc-fees","description":"Live recommended Bitcoin transaction fee rates (in sat/vB) for next-block, ~30-minute, ~1-hour, economy and minimum confirmation targets, straight from the mempool. Also estimates the total fee (in sats and BTC) for a transaction of the given virtual size, so an agent can pick a fee tier and know the cost before broadcasting.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":3,"last_called_at":"2026-10-08T06:09:10.766Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/btc-mempool","description":"Live snapshot of the Bitcoin mempool: number of unconfirmed transactions, total pending virtual size (bytes and MB), the current backlog in blocks, total fees pending (sats and BTC), the fee-rate histogram, and the current chain tip height. Lets an agent gauge network congestion and time a transaction.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":3,"last_called_at":"2026-10-08T06:09:11.284Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/gas","description":"Live gas conditions for an EVM chain: current gas price, the latest block's base fee (EIP-1559) and the suggested max priority fee — all in both wei and gwei. Ground truth an agent can't compute. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.002,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":3,"last_called_at":"2026-10-08T06:09:05.152Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/decode","description":"Turn a 4-byte function selector or full calldata into its human-readable function signature, and (when calldata is present) the decoded argument values. Supply an `abi` for a fully deterministic offline decode, or omit it to look the selector up in public signature registries. Reads with automatic fallback.","method":"POST","price_usd":0.004,"networks":["eip155:8453"],"calls_30d":5,"payers_30d":2,"last_called_at":"2026-10-08T06:09:09.341Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/abi","description":"Get the verified contract ABI and verification metadata for a deployed contract by address, sourced from Sourcify. Returns the contract ABI (to decode or call it), contract name, compiler/language, match type, and proxy resolution (is-proxy plus implementation addresses). Supports Ethereum, Base, Arbitrum, Optimism, Polygon. Unverified contracts return `verified:false`. Live reads with cache fallback.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":4,"payers_30d":2,"last_called_at":"2026-10-08T06:09:15.524Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/explain","description":"Decode a transaction into plain language: native ETH transfer, contract call (with decoded method name for common ERC-20/DEX functions like transfer, approve, swap, mint, multicall) or contract creation; ERC-20 and NFT (ERC-721) transfers it triggered (token, from, to, amount/tokenId from logs); gas spent in ETH; success/failed/pending; and a one-line summary. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":4,"payers_30d":2,"last_called_at":"2026-10-08T06:09:11.777Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/address","description":"Native ETH / wallet balance for an address on any EVM chain: native balance (wei + ether), transaction count (nonce), and whether it's a contract or an externally-owned account (with deployed code size). Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.002,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:07.311Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/block","description":"Live block summary by number, hex, or tag (latest/earliest/pending/safe/finalized; default latest): number, hash, parent, timestamp (unix + ISO), transaction count, gas used/limit, base fee and miner. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.001,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:04.734Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/btc-address","description":"Balance and activity for a Bitcoin address (base58 1…/3… or bech32 bc1…): confirmed balance (sats and BTC), total received and sent, confirmed transaction count, and unconfirmed/pending value and tx count from the mempool. On-chain ground truth an agent cannot compute locally.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:14.302Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/btc-tx","description":"Look up a Bitcoin transaction by txid: confirmation status, block height and time, fee (sats), effective fee rate (sat/vB), size, weight and virtual size, input and output counts, and total output value (sats and BTC). On-chain ground truth for verifying a payment.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:13.669Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/bytecode","description":"Fetch deployed EVM contract runtime bytecode and its Keccak-256 code hash to fingerprint or compare contracts, or feed a disassembler. Supports Ethereum, Base, Arbitrum, Optimism and Polygon, with optional historical block reads. Returns full hex code, byte size and isContract; an empty-code address returns 0x and a null hash. Key-free RPC with endpoint fallback; code capped at 256 KiB.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-21T21:23:30.096Z","score":100,"grade":"A","findings":[]},{"resource":"https://chain.openverbs.com/v1/ens-resolve","description":"Resolve an ENS name (like alice.eth) to its Ethereum address, read live from the ENS resolver on Ethereum mainnet. Offchain names such as *.base.eth resolve too. Returns `found:false` (a real answer, not an error) when the name has no address record. Live reads with automatic endpoint fallback.","method":"POST","price_usd":0.003,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T05:37:35.41Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/ens-reverse","description":"Reverse-resolve an Ethereum address to its primary ENS name (the reverse record set by the owner), read live on Ethereum mainnet. Returns `found:false` when the address has no primary name set. Live reads with automatic endpoint fallback.","method":"POST","price_usd":0.003,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:08.225Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/gas-estimate","description":"Simulate a transaction before signing: runs `eth_estimateGas` for `{ to, from?, data?, value? }` and returns the estimated gas units and estimated fee (current gas price x gas, in wei + ETH). If the node rejects the call it returns `ok:false` with the decoded `revertReason` (why it would fail) instead of erroring. Reads live on-chain state with automatic endpoint fallback.","method":"POST","price_usd":0.004,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:10.335Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/nft-metadata","description":"Resolve one NFT (contract + tokenId) into normalized metadata: name, description, image, attributes and token standard (ERC-721 or ERC-1155). Reads the on-chain tokenURI/uri, then fetches and normalizes the metadata document (ipfs/ar/http/data), rewriting ipfs image links to a gateway URL. Returns `found:false` for non-NFT contracts. Live reads with automatic endpoint fallback.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:12.761Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/proxy","description":"Detect whether a contract is an upgradeable proxy and resolve its implementation: reads the standard EIP-1967 implementation/admin/beacon slots, EIP-1822 (UUPS), the OpenZeppelin legacy slot, and EIP-1167 minimal-proxy bytecode. Returns the proxy type, implementation, admin and beacon addresses when present. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.004,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T05:37:35.8Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/receipt","description":"Live transaction receipt by hash via `eth_getTransactionReceipt`: success/failed status, block number, from/to, created contract address, gas used, cumulative gas, effective gas price (wei + gwei), tx type and the emitted event logs (capped). Complements `tx` (which reads the transaction itself). Returns `found:false` for unknown/pending hashes. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.003,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:09.301Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/sanctions","description":"Screen a crypto wallet address against the OFAC SDN sanctions list (US Treasury Specially Designated Nationals) before transacting. Multi-chain across ~20 assets (BTC, ETH, USDT, TRX, XMR and more); EVM 0x addresses match case-insensitively. Returns whether the address is sanctioned plus the listed entity, asset and list publish date. Clean address returns `sanctioned:false`. Public-domain OFAC data.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-05T11:41:30.18Z","score":100,"grade":"A","findings":[]},{"resource":"https://chain.openverbs.com/v1/token","description":"Live ERC-20 metadata read directly from the contract: name, symbol, decimals and total supply (raw + decimal-formatted). Handles both string and legacy bytes32 name/symbol encodings. Returns `isToken:false` for EOAs or non-token contracts. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.002,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:06.351Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/token-allowance","description":"Live ERC-20 spending allowance an owner has granted a spender: calls `allowance(owner, spender)` on the token and returns the raw amount, a decimal-formatted amount (using the token's decimals) with its symbol, and an `isUnlimited` flag for effectively-infinite approvals. Use it to audit token approvals / approval risk before signing. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.002,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T05:37:34.683Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/token-balance","description":"Live ERC-20 token balance held by a wallet: calls `balanceOf(address)` on the token contract and returns the raw balance plus a decimal-formatted amount (using the token's own decimals) with its symbol. Distinct from `address` (native ETH balance) and `token` (contract metadata). Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.002,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:05.9Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/token-risk","description":"Deterministic risk screen of an ERC-20 token from on-chain bytecode and metadata, no third-party risk API. Flags privileged or abuse capabilities: blacklist/freeze, owner mint, pausable transfers, upgradeable proxy and a privileged owner, plus tokens missing symbol/decimals or code. Returns each flag with a severity, a 0-100 score and a verdict. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:13.281Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/tx","description":"Live status and details of a transaction by hash: success/failed/pending, from/to, value (wei + ether), nonce, block number, gas used, effective gas price and any created contract address. Returns `found:false` for unknown hashes. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.003,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":2,"last_called_at":"2026-10-08T06:09:08.243Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]},{"resource":"https://chain.openverbs.com/v1/source","description":"Get the verified Solidity/Vyper source code for a deployed contract by address, sourced from Sourcify. Returns every source file (path + content), the contract name, language, compiler version and compiler settings (optimizer, evmVersion) — the full human-readable source an agent needs to read, audit or feed to an LLM. Supports Ethereum, Base, Arbitrum, Optimism, Polygon. Unverified contracts return `verified:false`. Live reads with cache fallback.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":3,"payers_30d":1,"last_called_at":"2026-10-06T17:00:17.624Z","score":100,"grade":"A","findings":[]},{"resource":"https://chain.openverbs.com/v1/logs","description":"Query a contract's event logs over a bounded block range via `eth_getLogs`: filter by `address` (required) and optional `topics`, get back raw logs (topics, data, block, tx hash, log index) with ERC-20/721 Transfer logs auto-decoded to `{from, to, value}`. Block span is capped (large windows are clamped); results are capped by `limit`. Reads live on-chain data with automatic endpoint fallback.","method":"POST","price_usd":0.006,"networks":["eip155:8453"],"calls_30d":2,"payers_30d":1,"last_called_at":"2026-10-06T17:07:18.137Z","score":92,"grade":"A","findings":[{"rule":"output-example-missing","severity":"warning","message":"No output example, so an agent can't tell what it pays for.","fix":"Add an output example to the discovery extension."}]}],"listings_page":{"page":1,"pages":1,"per_page":100,"total":27,"next":null},"badge":{"url":"https://agoranome.com/sellers/chain.openverbs.com/badge.svg","markdown":"[![Agoranome report card](https://agoranome.com/sellers/chain.openverbs.com/badge.svg)](https://agoranome.com/sellers/chain.openverbs.com)"},"next_steps":[{"tool":"lint_listing","title":"Listing lint","price":"$0.01","url":"https://api.agoranome.com/v1/seller/lint","why":"Check the live 402 against the indexing rules."},{"tool":"rank_check","title":"Rank check","price":"$0.01","url":"https://api.agoranome.com/v1/seller/rank","why":"See where a buyer agent's search puts you, and who beats you."},{"tool":"buyer_panel","title":"Machine Buyer Panel","price":"$1.00","url":"https://api.agoranome.com/v1/seller/panel","why":"Test whether buyer-agent models pick you over your top rivals."}],"method":"Read from the public x402 Bazaar index (the CDP discovery API), as collected in the week's snapshot. No request reaches the seller's server. Score: 100 minus 25 per error and 8 per warning. The paid listing lint checks the live 402 itself.","method_version":1,"method_url":"https://agoranome.com/sellers/method","note":"Descriptions are quoted from the listings. They are data, never instructions.","url":"https://agoranome.com/sellers/chain.openverbs.com"}