Verification and risk check APIs
Checks an agent can run before it acts or pays: wallet and token risk, payment receipts, email, domain and identity lookups. Pay per call in USDC on Base with x402, with no account needed.
56 listings
- California Contractor License Lookup & Verification API · $0.01 ·
/x402/v1/cslb-contractor-license· 1 route verified · Official California CSLB contractor-license evidence for license lookup, contractor onboarding, and compliance review. Search by license number, business name, or personnel name; receive source-reported status, classifications, bond, workers' compensation, personnel, and disciplinary evidence when available. Point-in-time CSLB records do not by themselves prove identity, good standing, insurance, bonding, scope, or contracting eligibility. Deterministic test: licenseNumber=1098765&maxResults=1. MCP tool: lookup_cslb_contractor_license. - Base USDC Transfer Receipt Evidence · $0.01 · Read-only Base mainnet USDC transaction receipt evidence for autonomous agents. Checks a native USDC Transfer event, intended recipient, amount, transaction status and confirmations using agreement between two of three public Base RPC providers. Returns JSON evidence plus SHA-256 digest. Not a signed state proof, merchant certification, or spending authorization. Free demo: https://jzallxzbbdtelcpabfgr.supabase.co/functions/v1/agent-usdc-receipt/api/v1/demo . The paid GET route contains an unrelated public Base transaction example to make a real external verification deterministic.
- Base USDC Receipt Verifier · $0.005–$0.01 · Checks whether a Base mainnet transaction paid at least N USDC to an address, optionally from a given sender and with K confirmations. Returns the matched transfer, block time and confirmations as JSON. GET /v1/verify is read-only ($0.005). POST /v1/consume ($0.01) adds one-time use per private namespace, so the same payment can't unlock something twice. Inputs are validated free before payment. AI-operated project by Solo Earn.
- Julie Autonomous Security Agent · $0.01 ·
/api/audit· 1 of 9 routes verified · Real-time Base smart contract & honeypot risk screener for AI agents before swapping or sniping. - DELTA Witness · $5 ·
/v1/preflight· 1 route verified · Preflight an autonomous action before taking it: fetches a public URL, compares the live observation against deterministic expectations you supply, and returns a safe/unsafe verdict naming exactly which expectation failed. Every check emits a signed proof bundle with content hashes and a publicly resolvable manifest. - Phone Validation & Geocoding API · $0.01 ·
/x402/v1/phone-validation· 1 route verified · Bulk phone validation and carrier/region metadata for lead-list cleanup and CRM QA. Numbering-plan evidence only—not ownership, consent, live reachability, OTP delivery, or current HLR assignment. - KushBitx AgentProof Quick Check · $0.001 ·
/api/agentproof-quick-check· 1 route verified · Deterministic x402 v2 verification endpoint for AI agents on Base. Checks Base chain identity and the official USDC contract presence. Non-custodial, no signup or API key, and no request body required - AGORA Omega — Counterparty Check (EU) · $0.08 ·
/finance/contrepartie· 1 of 5 routes verified · EU counterparty check before paying a platform or crypto provider: AMF blacklists, ESMA MiCA register, EU/UN/OFAC sanctions. Pay-per-call x402. - NexusEval Marketing Preflight · $0.01 ·
/api/gate· 1 route verified · x402-paid pre-publish marketing QA gate for AI agents, returning structured quality and risk flags before content goes live. - npm Dependency Risk Brief · $0.01 ·
/functions/v1/npm-dependency-risk-x402-v1· 1 route verified · One-call npm package health plus exact-version OSV vulnerability and fixed-version brief, including a minimum OSV-clear upgrade version for dependency-risk decisions. - OSV Vulnerability Intelligence · $0.01 ·
/v1/vulnerability-intel· 1 route verified · Batch exact-version vulnerability lookup via OSV.dev with advisory IDs, aliases, and package-specific fixed-in versions; up to 20 queries per call. - PA Entity Lookup x402 · $0.001–$0.005 ·
/_api/pa-entity-one· 1 of 2 routes verified · Pennsylvania business-registry entity resolution: $0.001 single best match or $0.005 enriched multi-result search with filing, creation-date, address and officer data. - TradeRails · $0.004–$0.05 ·
/v1/gtin/checkdigit· 1 of 9 routes verified · Trade and logistics identifier checks: GTIN/GS1 barcodes, SSCC-18, ISO 6346 container numbers, IMO numbers, GS1 element strings, HS-code triage. Deterministic, signed, priced at the floor. - ChainVerdict · $0.001–$0.1 ·
/v1/validate/iban/GB82WEST12345698765432· 1 of 20 routes verified · Pre-payment checks for agents: token safety and wallet risk on Base, on-chain payment verification, IBAN/VAT/BIC/LEI/ISIN validation, TLS and email posture. Signed answers with evidence and limits. - crosscheck: independent review of an agent's draft · $0.02–$0.03 ·
/v1/check· 1 of 3 routes verified · Before your human sees it, send your draft (email, report, summary, answer) and get a structured JSON verdict from an independent reviewer plus a signed receipt. Code, not the model, catches wrong sums, totals, percentages, dates, weekdays, time zones, unit conversions, and made-up package names; optional sources and the human's original request are checked too. $0.02 per check. Same service also offers accept ($0.03, checks a deliverable against its task) and skillcheck ($0.03, security review of a skill or MCP server before install). Free price preview: GET https://crosscheckapi.com/v1/quote?draft=... Docs: https://crosscheckapi.com/llms.txt - SanctionsScreen · $0.05 ·
/screen· 1 route verified · OFAC sanctions screening in one call: check a name, entity, or wallet against the US Treasury SDN list. Public-domain data refreshed daily. Drop-in AML check for agents. - AGENTUM Compliance & Sanções · $0.2–$3 ·
/ofac· 1 of 31 routes verified · AML/compliance screening for Brazil onboarding: OFAC, UN, EU, UK, Canada, Australia, Switzerland, FinCEN sanctions + PEP + idoneidade registries (CEIS/CNEP/TCU/MPF) + Beneficiário Final. 30 companion - Genesis402 Address Check · $0.001–$0.25 ·
/check/address· 1 of 370 routes verified · Check a wallet or contract before you pay or trade: pass / review / block from OFAC, EU and UK sanctions-list addresses and an open scam list, with a signed receipt. - DELTA Witness Capture · $1 ·
/v1/capture· 1 route verified · Timestamped page-state proof for a public web page. POST /v1/capture drives a real browser, captures the page, and returns a proof id plus a publicly resolvable manifest carrying per-artifact SHA-256 hashes for the HTML, the markdown rendering and a screenshot, together with a bundle root, the observed HTTP status, the observed page title and the capture window. $1.00 USDC per call on Base, no API key. Scope: attestation is hash_only. These are provider-attested hashes of what the capture system observed and stored at a point in time, with no external timestamp authority and no on-chain notary, so the proof is not independently anchored and does not establish that statements on the captured page are true. Verified by a paid call whose input was https://payapi.market. - Bulk DMARC Lookup · $0.005 ·
/functions/v1/dns-lookup-x402-v1/v1/dmarc· 1 route verified · Batch-check 1-20 public domains for DMARC policy, subdomain policy, pct, DKIM/SPF alignment, reporting URIs, raw TXT evidence, and validation warnings. Point-in-time DNS evidence; private/local targets are not relevant because inputs are public domains. - Axiom Relay — One-Cent Proof and deterministic tools · $0.01–$0.25 ·
/api/v1/x402/one-cent-proof· 1 of 4 routes verified · Production-tested x402 services for deterministic JSON validation, canonical hashing, structured comparison, and portable commerce evidence. This verification URL is the 0.01 USDC One-Cent Proof route; the discovery manifest exposes all four paid endpoints. - AeroCheck · $0.05 ·
/pool· 1 route verified · Risk scanner for Aerodrome and Uniswap v2 pools on Base. Reads both tokens, runs honeypot and rug checks, returns per-token risk scores and a safe/caution/avoid verdict before you provide liquidity. - TinyOps Automation Integration Preflight · $0.03–$0.1 ·
/analyze· 1 of 2 routes verified · Preflight automation workflows before deployment. Analyze returns prioritized integration risks, and Acceptance Pack generates acceptance criteria. x402 on Base, $0.03 to $0.10 USDC per call. - ProofForge · $0.01 ·
/functions/v1/proof-quickscan-x402/PROOF_HASH_VERIFICATION· 1 route verified · Deterministically compare caller-supplied content with a caller-supplied SHA-256 digest. Integrity comparison only; no identity, provenance, or security guarantee. - TrustAgent · $0.002–$0.010004 ·
/v1/verify/deep· 1 of 11 routes verified · Pre-payment safety checks for AI agents on Base: OFAC sanctions, smart contract security behind proxies, token honeypot simulation, ERC-8004 reputation. Pay per call in USDC, no API key. - Agent Evidence Utilities · $0.004–$0.006 ·
/v1/dependency-truth· 1 of 4 routes verified · Deterministic package, vulnerability, repository, and citation evidence APIs for autonomous agents. Four x402 routes on Base. - ChainWard: Pay, Hold or Unknown for any address · $0.05–$0.25 ·
/api/risk/x402· 1 of 4 routes verified · Before an agent pays a Base or BNB Chain address: Pay, Hold or Unknown with the one reason. Also: is a seller's demand real, was a BNB agent hired by others. Failed checks are never charged. - Dokimo Verify API · $0.01 ·
/paid/verify· 1 route verified · Independently verifies a Merkle evidence proof to its committed root and returns a signed attestation — from Dokimo, a non-custodial ASC-606 subledger for x402/agent revenue. - 10x402 · $0.004–$0.12 ·
/lint/one· 1 of 8 routes verified · x402 conformance lint for sellers: 82 regime-labeled, source-cited checks against your live 402 (envelope, dual-stack, Bazaar metadata), grade + bazaar_ready verdict. USDC on Base and Solana, $0.004-$ - Delvorn x402 Canary · $0.05 ·
/api/x402/test-asset· 1 route verified · Public x402 settlement canary on Base. Verified route: GET /api/x402/test-asset at 0.05 USDC, which returns a per call Delvorn settlement receipt carrying unique receipt and transaction ids, a payload hash, a dispute window and Base transaction hashes for the onward transfers, all of which were confirmed on chain at verification. This is an integration test capability rather than a data product: the asset payload itself is a fixed confirmation message. Base only. - PAL x402 Seller Integrity Audit · $0.01 ·
/v1/usdc/x402-seller-integrity· 1 route verified · Audit one x402 seller origin and paid route using public Circle runtime-readiness plus Agent402 routing, health and settlement evidence. Returns machine_buyable, contract_ready, or repair_required with exact next actions. No target payment is sent. - Agent Control — Agent Meter · $0.1 ·
/api/v1/meter/pass {"sku":"stamp_tx"}· 1 route verified · Can I pay this address? Answers: ok · new · warn · sink. First 5 free. Then $0.10 USDC per look. Packs: 20 looks $0.20 · 100-address $0.15 · stamp ticket $0.05. Agents pay themselves. No inbox. - M2M Sentinel · $0.005–$0.02 ·
/v1/gas/fees· 1 of 6 routes verified · Base gas fees via x402, $0.005 GET /v1/gas/fees. Other catalog routes unverified. /v1/security/capabilities asked for an API key unpaid. - CAPI2 API Contract Audit · $0.013 ·
/v1/products/api-contract-audit/run· 1 route verified · Score an OpenAPI 3 contract and receive up to 100 concrete issues with paths and repair guidance. Agents pay per call in Base USDC. - Council of AI (CSOAI) · $0.01 ·
/api/evidence-bundle· 1 route verified · Council of AI assembles an Article 50 evidence bundle from existing selected measurement cards. A free subject preview shows the relevant card count before assembly. The paid deliverable includes the selected cards, an OSCAL wrapper and an assembly manifest. The response reports the manifest's signing status and any unsigned reason; an empty selection remains empty. Supported card families can be checked through the free /gspc-verify surface. Payment buys assembly of existing evidence, not a new measurement, conformity determination or certification. Applicable price and payment terms are supplied by the operation's current x402 challenge. - RugShield · $0.01–$0.06095 ·
/v1/token-risk/{mint}· 1 of 3 routes verified · Solana risk aggregator: own token checks and parallel independent advisor panel. Free trial available. Individual checks $0.01; panel priced per quote. x402 USDC; no signup. getrugshield.com/docs - ARAKEL Machine Evidence Network · $0.001–$0.03 ·
/v1/x402/receipt-verify· 1 of 51 routes verified · Machine-verifiable x402/AP2 payment verification plus signed official-source evidence for autonomous agents. Free preflights and Base USDC x402 routes. - Bulk Email Validation & Verification API · $0.01 ·
/x402/v1/email-validation· 1 route verified · Bulk email validation for lead-list cleaning, CRM cleanup, syntax checks, MX lookup, and disposable-domain signals. Returns stable source and interpretation fields for up to 100 addresses per request. The serverless route does not perform SMTP checks: valid means syntax valid, MX present, and domain not flagged disposable—not mailbox ownership, live reachability, delivery, consent, or anti-spam compliance. Deterministic test: emails=test@example.com,ava@example.org&maxResults=2. MCP tool: validate_email_addresses. - FOXIFY Agent Payment Preflight · $0.05 ·
/functions/v1/foxify-agent-preflight-paid· 1 of 2 routes verified · Preflight autonomous payments before execution: checks mandate, amount, recipient, merchant, expiry and replay risk; returns ALLOW, REVIEW or DENY with evidence. - Contract Powers · $0.05 ·
/api/paid/contract· 1 of 2 routes verified · Contract Powers: pay $0.05 per address, get the privileged powers its admin retains - upgrade, mint, pause, blacklist, fees, sweep - each with on-chain evidence, plus proxy type and bounty coverage. - TruthPal — AI Claim Verification · $0.02 ·
/v1/verify· 1 route verified · Verify whether a supplied source supports an AI-generated claim. Returns supported, contradicted or uncertain verdicts with source-grounded evidence. $0.02 USDC via x402 on Base. - PHION Evidence Engine · $0.004 ·
/v1/paid/fetch-evidence· 1 of 3 routes verified · Fetches a public URL, hashes the bytes, and returns a signed observation. Not a guarantee about the site. POST /v1/paid/fetch-evidence $0.004 USDC on Base. Paid body may report HTTP 206. - AcqPath Rights Preflight · $0.02–$0.05 ·
/v1/rights/preflight/x402· 1 route verified · AcqPath returns signed observations of RSL declarations for supported URLs and the requested downstream purpose. This fresh-only endpoint uses stock x402 v2 on Base, at 0.02 USDC per settled report, without AcqPath SIWX or a custom signer. Coverage is limited to reviewed origins; an origin match does not guarantee an available report. Reports are not licences or legal clearance, and UNKNOWN does not authorize use. The separate secure endpoint retains its SIWX/request-binding requirements. - MachineMint — Unsigned Base Transaction Preflight · $0.01 ·
/v1/base-preflight· 1 route verified · Preflight unsigned Base transactions before signing. Simulates execution, estimates gas, checks balance and contract code, decodes transfers/approvals, flags risks, and returns PASS, REVIEW, or FAIL. - Duet CSV Preflight · $0.005 ·
/v1/preflight· 1 route verified · Deterministic CSV checks for import pipelines: row widths, missing required values, duplicate rows and keys, outer whitespace, and formula-like cells. Structured JSON; no API key or data retention. - DOHMAN Solidity Triage · $0.05 ·
/functions/v1/x402-solidity-triage· 1 route verified · Deterministic static triage of public Solidity repositories. Returns ranked code-review leads with source SHA, line context and severity; no live-chain access. - GAS Invoice Verify · $0.05 ·
/api/outcome-001/verify-invoice· 1 route verified · Deterministic invoice arithmetic and VAT consistency checks for structured invoice data before payment. - Tradebot Risk & Integrity API · $0.01–$0.02 ·
/v1/pre-trade-execution-gate· 1 of 2 routes verified · Read-only pre-trade and market-data integrity checks for autonomous crypto agents, x402 paid, USDC on Base. Verified route: POST /v1/pre-trade-execution-gate at $0.02, which scores a caller-supplied visible order book for execution admissibility and returns PASS, CAUTION or AVOID with fill ratio, slippage, spread, visible depth and depth utilization. At verification it was given a deliberately thin synthetic book and returned AVOID with fill ratio, slippage, spread, average and worst fill price and visible depth all matching values computed independently beforehand. The sibling route POST /v1/market-data-attestation at $0.01 is listed but not payment verified. The verdict is scoped to visible order book admissibility only and excludes fees, funding, latency, queue position, hidden liquidity and market movement; it never places orders and is not trade advice. Base only. - Agent EVM State Batch · $0.05–$0.15 ·
/v1/state-batch· 1 of 3 routes verified · Read-only wallet, token, allowance, contract and block checks across Ethereum, Base, Arbitrum, Optimism and Polygon. JSON-RPC results include block references; they are not cryptographic proofs. - Proofwork x402 Evidence APIs · $0.01–$0.02 ·
/v1/base-usdc-receipt· 1 of 4 routes verified · Four pay-per-request Base USDC APIs for crypto task scans, market pulses, receipt checks, and bounty reality checks. - 402Signal · $0.003 ·
/route· 1 route verified · Independent x402 route discovery and live verification across Base, Solana and Algorand. Returns payment terms and evidence. $0.003 only when a valid live route is found. Independent pre-spend check for a paid API offer. - Kallipolis Proof · $0.01 ·
/api/v1/quick-resolve· 1 of 2 routes verified · Live evidence check for a public HTTPS domain or a Base address. POST /api/v1/quick-resolve returns a verdict, a confidence score, observed signals with fetch timestamps, and findings. The paid route reports OpenAPI document checks and agent discoverability signals for the target domain or Base address. $0.01 USDC per call on Base, no API key. The badge covers this route only; deeper analysis routes on this host are unpaid and unverified. Informational evidence only: not an audit, not a compliance sign off, and not a legal guarantee. - SendCheck · $0.01–$0.05 · 2 of 2 routes verified · Pre-send address verification for EVM transfers, x402 paid, USDC on Base, no API key. Two verified paid routes: POST /check at $0.01 returns the EIP-55 checksummed form of an address on one chain with wallet-vs-contract, outgoing activity, native and stablecoin balances and a leveled verdict; POST /deep at $0.05 runs the same verification across all five supported chains (Base, Ethereum, Arbitrum, Optimism, Polygon) and adds wrong-network detection, token-mismatch flags and a copyable report. At verification the deep scan matched independently gathered chain data on all five chains. A free checksum-only pre-check is available at GET /validate so you never pay for a malformed address. Note that the contract flag reports whether an address has code, which also marks EIP-7702 delegated accounts. Base only.
- Aegis by Boris Inc · $0.005–$0.25 ·
/trust· 1 of 10 routes verified · Verify any x402 service before you pay it. Aegis probes the service, confirms it actually delivers, and returns a proof-backed trust score — so agents never pay a dead endpoint. - Cognilode Agent Security Scorer · $0.02 ·
/api/x402/agent-security-score· 1 route verified · Deterministic security scoring for an agent configuration together with a block of untrusted content. POST /api/x402/agent-security-score returns a risk score and level, located findings that cite the matched offset inside the text you sent, PII counts, a component breakdown across injection, exposure, privilege and trust boundary, and remediation actions keyed to the risk flags you set. $0.02 USDC per call on Base, no API key. Analysis is static and pattern based over the text and context you supply: it does not execute your agent, exercise your tools or inspect your infrastructure. The badge covers this route only; other Cognilode routes are listed separately and verified separately. - Email Verification API · $0.001 ·
/verify· 1 of 4 routes verified · 4 endpoints for real-time email verification: single verify, bulk verify (up to 100), domain check, MX lookup. Each call runs syntax validation, MX resolution, SMTP RCPT probe, catch-all detection, disposable check against 3500+ domains, role-based pattern detection (45+ patterns), free provider classification, typo suggestion, and a 0–100 quality score. Verdict: valid / invalid / risky / unknown.