chain.openverbs.com
8 x402 APIs served from chain.openverbs.com
Every listing from chain.openverbs.com that ToolVet tracks. Each one is called on a schedule without paying and scored out of 100.
At a glance
- Listings
- 8 x402 APIs
- Passing at the latest check
- 8 of 8
- Uptime, 30 days
- 100% on average across 8 listings
- Price
- $0.004 to $0.006 per call
- Trust score
- 75 to 77, median 77
- Paying wallets, 30 days
- 2 on its busiest listing
- Verified owner
- None
- Security findings
- None found
- Listed since
- 11 Oct 2026
The x402 Bazaar counts paying wallets per listing. A wallet that paid two listings counts twice. So the Bazaar saw between 2 and 14 different wallets paying chain.openverbs.com in 30 days.
All 8 listings
Ranked by trust score.
- 77trustSanctionschain.openverbs.com
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.
$0.006per call on Base100% uptime, 586 ms, 2 paying agentsPassing, checked 2 h ago - 77trustDecodechain.openverbs.com
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.
$0.004per call on Base100% uptime, 550 ms, 2 paying agentsPassing, checked 2 h ago - 77trustGas Estimatechain.openverbs.com
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.
$0.004per call on Base100% uptime, 553 ms, 2 paying agentsPassing, checked 1 h ago - 77trustProxychain.openverbs.com
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.
$0.004per call on Base100% uptime, 527 ms, 2 paying agentsPassing, checked 1 h ago - 77trustAbichain.openverbs.com
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.
$0.006per call on Base100% uptime, 563 ms, 2 paying agentsPassing, checked 1 h ago - 77trustRead Contractchain.openverbs.com
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.
$0.006per call on Base100% uptime, 533 ms, 2 paying agentsPassing, checked 2 h ago - 75trustSourcechain.openverbs.com
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.
$0.006per call on Base100% uptime, 582 ms, 1 paying agentsPassing, checked 55 min ago - 75trustLogschain.openverbs.com
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.
$0.006per call on Base100% uptime, 591 ms, 1 paying agentsPassing, checked 5 h ago
chain.openverbs.com also serves listings from 19 other providers. See all providers on chain.openverbs.com
How these numbers are made
Each listing is called on a schedule without paying. Listings with usage or a verified owner are checked about every 30 minutes, others about every 6 hours. Uptime is the share of passing checks over 30 days, averaged across this provider's listings. Trust scores follow the published method. The figures on this page can be a few minutes behind the latest checks, and listings hidden after review aren't counted.