All projects matching “chain”

Operational trust rating (AAA to D, trust line BBB) of any x402 service, as of today: tier, outlook, flags, uptime, organic paying agents, settled USDC, centrality. Sybil-resistant, computed daily from on-chain settlement on Base, Polygon, Arbitrum and Solana plus a liveness probe. Check a service before paying it. Free today-only JSON: https://agenteconomy.report/s/<host>.json

Check a Romanian e-Factura (UBL 2.1, CIUS-RO 1.0.9) before uploading it to ANAF SPV, and get the exact fix for every error: plain-English explanation, the official Romanian rule text, the UBL path of the field and, for amount errors, the correct value computed from the invoice (chained, so following the report gives a consistent invoice). Also validates Peppol BIS Billing 3.0 and EN 16931. No acco

Live ENSO (El Nino/La Nina) status, strength, trend, empirical persistence odds, and sector impact scores (agriculture, supply chain, insurance, energy), synthesized from NOAA CPC RONI/ONI records

Live on-chain ERC-20 token balanceOf and decimals on Base Mainnet (defaults to Base USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).

Wallet and contract safety check before you send funds or approve a spender. Send an EVM address (Base, Ethereum, BNB Chain, Arbitrum, Polygon, Optimism, Avalanche); get a verdict (DANGER, SUSPICIOUS, NO KNOWN ISSUES), scam flags (phishing, theft, scam-token creator, sanctions, mixer, money laundering) and contract checks (source verification, proxy, age, owner privileges, reported malicious behav

x402-preflight: confirm your wallet can transact, and see your balance, in one certified call. Pay $0.01 USDC on Base, get a signed on-chain-anchored receipt. The safe first transaction before you ship real volume.

Look up any Ethereum address — returns entity labels, name tags, and categories from 412K+ labeled addresses. AI agent API for on-chain identity resolution

Concentrated-liquidity range evidence for one Aerodrome Slipstream pool on Base: the narrowest price range that stayed in range for a target share (80/90/95 %) of the last 24-720 h, with in-range %, out-of-range episodes, hourly coverage and block-level evidence from on-chain observations. Useful when choosing or re-centring an LP range. Refused or stale queries return 4xx/503 before any payment.

Single-fact: current Monero chain height + sync status. Sourced from a live operator-run monerod node.

Trust score (0-100) for an x402 service listed in the Bazaar: liveness probe, on-chain payer diversity, reported-vs-verified revenue (detects inflated counters and self-dealing), and listing age. Returns full component breakdown and flags.

Goldsky Feeds: Prediction markets and Chain datasets — prepaid balance, funds ~500 requests at 10 atomic units each

Live gas price on Ethereum, Base, Arbitrum, Optimism or Polygon, in gwei plus the cost of a plain transfer. Compare several chains in one call.

x402 market intelligence with current catalog-attributed USDC flow, address-level demand signals and separately labeled value-matched history. The headline covers Base only (market.universeChains); the multi-chain picture ships alongside it as ecosystem, split into an RPC-proven floor and an indexed upper bound that are not additive (notASum). Attribution is not exclusive protocol-intent proof.

Inspect citation overlap before counting corroboration. Supply 2-10 URLs, optional article HTML and citation chains. Returns duplicate URLs, shared links and supplied-source groups with locations. No fetching, truth or independence verdict. See /openapi.json for schemas and examples.

Pre-transaction counterparty check for an EVM wallet or contract: OFAC SDN screening, GoPlus malicious-address flags (phishing, drainers, laundering, mixers ...), and a live on-chain profile (EOA / contract / EIP-7702, nonce, balance, ENS, first transaction, contract verification). Returns risk_level, a plain recommendation (do_not_transact / review_before_transacting / no_red_flags_found), every

Something you cannot do while your agent is dead: keep watching. One paid call buys 7 days of it — on-chain on Base (wallet activity, whale transfers, price crossings, new pools), a dead-man switch that fires when YOUR agent goes silent, a cron/schedule webhook, or a url-change web monitor. Every event carries a signed Ed25519 receipt proving a third party observed it then — which your own logs ca

Which x402 services actually deliver — every one paid-tested with real USDC, receipts on-chain.

Check a public website's security hygiene before your agent links to it, recommends it, or sends data to it. One URL in, deterministic JSON out: HTTPS and redirect chain, HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, security.txt, robots.txt, sitemap.xml, plus plain-language notes. Private, localhost and raw-IP targets are rejected; error responses are no

Run before sending ETH or USDC or paying gas, to confirm the wallet really has enough. Never trust a balance remembered from earlier in a chat. Reads a wallet's ETH and native USDC balance on Base directly from the chain, at one block.

Prepaid travel eSIM data plans, sold per order for USDC on Base via x402. For agents buying mobile data abroad for a person's phone or tablet. 1433 single-country, regional and global plans, $0.99 to $202.99 depending on the plan picked by launch_sku_id (listed at GET /catalog). Once payment settles on-chain, the eSIM is retrievable with the order's delivery key or claim secret. This generic chall

XR-Pulse normalized XRPL signal feed (news + on-chain whale activity)

DJZS adversarial logic audit of a prediction-market trade intent. Deterministic verdict (PASS/WAIT/FAIL) with risk score, defect flags, verdict_hash, and on-chain Proof-of-Logic receipt. Out-of-scope requests are refused WITHOUT CHARGE. Audit, not advice.

Classify a product description into candidate HS/HTS10 tariff codes. Deterministic BM25 retrieval over the USITC HTS schedule with heading-agreement boosting, returning the full parent-chain description, general duty rate, and a score-gap confidence per candidate. Not a customs ruling — always includes a disclaimer to verify with a licensed broker.

Runs live diligence on an x402-metered endpoint before you pay it: verifies its 402 payment challenge is spec-compliant, checks the price against market baselines, inspects the payTo address on-chain (Base), checks third-party directory presence, and checks basic infra hygiene, and detects possible upstream API resale with evidence-based markup estimates. Returns a 0-100 score, a pass/caution/fail

Retrieve a derived chain or protocol activity proxy. Include scope and a canonical target such as Ethereum or a protocol slug.

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

Google deps.dev / Open Source Insights package metadata (keyless). POST {system, name|package}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Disclose adjacency: packagist-package / nuget-package / osv-vuln-query / openssf-scorecard (≠ those products; deps.dev supply-chain lane).

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

A registry of token records with a build log. A record is written only by the token's provable controller (on Solana: the pump.fun curve creator or the mint's update authority) and every version carries that ed25519 signature, so a reader verifies against the chain, not a directory. One $0.02 x402 write in USDC on Base, Polygon, Solana or Arc; reads, pages, log and OpenAPI are free.

A Lasso EVM RPC key funded with this USD credit: one endpoint per chain, routed across providers with failover. The paid response returns the key and its RPC URL.