x402 Verification API

Answers whether an address or service actually received USDC on Base: third-party total, distinct sender count, first and last seen, with the scope stated in every response. Transfers from the operator's own wallets are excluded from the headline figure, so internal test activity cannot read as demand. Also measures whether agent marketplaces and venues actually pay (payability, buyer history, venue settlement).

Four small pay-per-call x402 APIs for AI agents on one domain, USDC on Base, no signup or API key. AgentGate ($0.005): is an AI agent registered, Active and Verified in the Concordium Agent Registry. WebRead ($0.002): any public web page as clean Markdown, respects robots.txt. InjectScan ($0.003): prompt-injection scan for text, URLs and MCP tool definitions. DomainCheck ($0.002 domain / $0.001 email): DNS, MX, SPF/DMARC and disposable-email checks. Each tool has a free preview and a free remote MCP server at /<tool>/mcp. Built and run by Crypto Money Maker (AI agents with human oversight).

Wicked Registry runs real synthetic checks against x402 and MCP tools and publishes live uptime, latency, and schema-conformance scores. It doesn't compete with other directories — it scores the tools already listed there, so agents know what's actually reliable before paying for a call. Zero check history returns "insufficient data," never a fabricated number. Free embeddable reliability badges for tool owners.

Evaluate an Apify actor before you use it. Send one actor ID (for example apify/instagram-scraper) and get an evidence-backed quality report: 23 built-in criteria like reliability, 30-day failure rate, advertised-field truth, and cost per usable item, deep-scan criteria measured from live funded runs, or your own rubric in plain English. Use it to audit a scraper, compare actor quality, or pick the best actor. Returns JSON with per-criterion scores, evidence, and a verdict.

Verify any x402 endpoint before your agent pays: liveness, scam/anomaly scan (payTo hijack, bait-and-switch, honeypot), on-chain receiver verification and an open Trust Score. Continuous independent audit of the whole x402 ecosystem (~5k endpoints tracked). Paid: /trust $0.02, /trust/dataset $0.10, /data/full $1 (cross-domain x402+MCP dataset). Free: /verify, /status.json, /incidents (security disclosures with on-chain proof).

Compare a proposed payment with current advertised terms for supported x402 endpoints. Receive ALLOW, HOLD or DENY with source-bound reasons and a verifiable receipt. Assessment costs 0.10 USDC on Base. Supports AgentPay’s reference endpoint and X402 Data API domain-intel using the fixed api.x402-engine.com probe; other targets return HOLD. Does not buy the external report or certify merchant identity or delivery.

Deterministic evidence-linked UK Skilled Worker sponsor-change compliance preflight for employer, HR and HRIS agents.

Automated security screening of smart contracts and B20 native tokens on Base (chain 8453). Pay per report over x402 in USDC (EIP-3009, CDP facilitator) and receive the Flash Report as JSON: ranked findings, evidence and declared limits. Every report states what it could not verify, as open items with the reason. This route has no escrow and does not anchor the report on chain: keep the settlement transaction and the SHA-256 of the bytes you receive. If the report is not delivered within 48 hours, the full amount is returned to the paying address within 14 days (terms, section 3.3). A free check with no wallet returns observed on-chain facts with no verdict and no score: verified source, proxy detection, admin selectors, holder concentration, and for B20 native tokens the issuer powers.

AML wallet + company counterparty checks for AI agents. $0.001 wallet-screen (PASS/WARN/BLOCK OFAC check), $0.05 compliance bundle (OFAC + domain trust + firmographics), $0.012 deep research, $0.95 verified company file. Ed25519-attested JSON, keyless x402 on Base USDC. Buyer pack: https://lionx402.com/for-agents

pkgproof is a package-verification oracle for AI coding agents. One call before npm install returns a single verdict (safe / caution / block / does_not_exist) backed by sourced reasons, each labelled fact or heuristic. It covers hallucinated package names, OSV MAL- advisories, malicious install scripts, typosquats and combosquats, freshly-planted slopsquats, and borrowed-repository provenance spoofing. If a data source is unreachable it answers 502 rather than vouching for a package it could not check.

Agent-native public URL verification API. Independently fetch one public HTTP(S) URL and return target HTTP status, final URL, raw response-body SHA-256 content fingerprint, byte length and UTC observation time. $0.0009 USDC per call via x402 on Base. No account or API key. Fixed public reproducibility vector documented.

Diagnoses why an x402 endpoint isn't indexed in the CDP Bazaar: checks the 402 response, the Bazaar declaration and CDP's live index status. Paid mode also makes one real test payment (routes priced up to $0.05) so CDP has a settlement to index. Pay-per-call in USDC on Base.

Queries live Google OSV.dev vulnerability intelligence for any PyPI, npm, Go, or Rust crate and returns active CVEs, GHSA advisories, and patched versions.

Orbylon checks whether a business can be found, trusted and paid by AI agents. The paid endpoint runs sixteen checks against any domain and returns the complete machine readable result, plus a hosted report URL a person can read. Settlement is USDC on Base, direct to the seller wallet. Orbylon never holds funds.

Before an agent pays or connects, it can buy a drainer + domain preflight over x402. Fail-closed. Signals, not a SAFE stamp. USDC on Base and Solana. Intelligence, not warranty.

Signed, verifiable pay-per-call x402 oracles for AI agents, settling in USDC on Base and Solana. Every paid answer is ECDSA-signed and appended to a public, tamper-evident hash chain, so an agent can verify authenticity before trusting it. On this domain: signed Solana settlement verification and signed monitoring of any x402 endpoint (Watchdog). Free signed preview on every service.

Paid public-data endpoints for AI agents, no API key and no account. POST /v1/evidence takes a question or claim plus up to 5 public URLs and returns cited evidence passages (source URL, retrieval time, content hash) with a supported/contradicted/mixed/inconclusive assessment, and charges nothing when nothing is retrieved. POST /v1/weather/alerts returns active National Weather Service alerts for a two-letter US state; POST /v1/weather/forecast returns the next five NWS forecast periods for a latitude/longitude. Each paid call is $0.01 USDC on Base over x402; discovery and the free sample/health tools charge nothing.

Pre-flight checks for autonomous agents: verify a package, repo, domain, or another x402 service before you trust it. Code checks (npm trust score, GitHub repo health), network checks (domain liveness), and ops checks (x402 service diagnostics). $0.02-$1.00 per call via x402 on Base, no signup, no API key.

Post-quantum attestation and evidence services for AI agents. Every paid response carries an ML-DSA-65 (FIPS 204) signed attestation anchored to Hedera mainnet HCS, with free public verification. Catalog: pay-per-call decision attestation from $0.005, bulk hash anchoring from $0.000027/record, attested gpt-4o-mini inference binding prompt and response hashes to the exact model version, agent operating-history lookups computed from records that cannot be backdated, independent attestation audits with mirror-node confirmation, attested Hedera network facts from $0.001, and a regulatory-change feed for AI systems. A failed mint is never charged.

Seller-quality reports for the x402 economy, built from real paid test purchases — price accuracy vs multi-exchange consensus, provenance consistency, latency, and receipt behavior. Not self-reported, not scraped: bought and measured. GET /sellers lists covered domains free; GET /report?domain=<seller> is $0.002.

Robinhood-chain (4663) & Solana token safety + dollar-weighted NET-USD accumulation footprint. Honeypot/rug detection via real buy+sell simulation, plus net-USD flow (accumulation vs distribution) that trade-count checks miss. The only service covering Robinhood-chain net-USD.

Multi-utility AI Agent suite: Claim Verification + Web-to-Markdown Reader + Live Search + JSON Extraction + Stealth Fetch + CAPTCHA Solving — pay-per-use via x402 on Base USDC. Note: /v1/verify costs 1.00 USDC per call.

Independent read-only external-state verification before autonomous agents retry or claim completion. Returns CONFIRMED, DIVERGENT, or INCONCLUSIVE with evidence provenance and receipt hash.

Pre-flight check on an AI agent in an on-chain registry (ERC-8004, Solana), a wallet that registers agents, or an endpoint host: dated flags for first seen, ownership changes, revoked ratings, and fleet, with sources. No score, no verdict. $0.01 a call in USDC over x402, on Base or Arc, with no key or account

Run one check before you invoice, onboard or pay out to a new EU counterparty: is their IBAN valid, is their VAT number registered, does their company domain actually exist and accept mail. One call, one price — instead of three separate lookups. Built for agents that automate invoicing, vendor onboarding or payroll/payout compliance in the EU.