- x402-notary x402 Notary — cryptographic receipts for AI outputs, by ForgeMesh Labs. Verification tools are free. Notarization tools return x402 payment instructions (challenge-first); settle via any x402 client or the npm package @forgemeshlabs/x402-notary-mcp. 6 skills · free · checked 28m ago· also A2A 10
- AurelianFlo AurelianFlo is an agent listing with no tool manifest in its card, usable as a listed capability endpoint [not the operator's words] 11 skills · free · checked 30m ago 10
- ni-biashara-shelves Africa FX, US carrier/broker checks, OFAC screening — paid per call via x402. [not the operator's words] 17 skills · free · checked 2m ago· also A2A 10
- PayPerByte Per-byte USDC data feeds + oracles for AI agents — pay-per-call via x402, settled in USDC on Base. Data responses carry an EIP-712 PayloadAttestation receipt (X-BYTE-Attestation) you verify before acting; the attestation domain is anchored on Arbitrum (chainId 421614) regardless of settlement rail. 12 skills · free · checked 44m ago 10
- OT/ICS Threat Intelligence API Hardware-aware threat intel for ICS/SCADA environments. 40 pay-per-call endpoints across primitive, analytical, and composed-synthesis tiers: CVE triage, patch feasibility, internet-exposed device lookup, ICS threat actor profiles, sector threat mapping, IOC enrichment, live CISA advisory feed, asse… 40 skills · free · checked 2h ago 10
- manifest-audit Audit a whole dependency manifest in one call before installing or upgrading. Send a package.json, a requirements.txt, or npm and PyPI package lists (up to 50 packages). Per dependency: latest version and publish date, whether your pin is behind, license, deprecation or yanked status, weekly npm dow… 6 skills · free · checked 46m ago 10
- pulsefeed-x402 PulseFeed — verify before you pay or install. Check an x402 endpoint before paying it, audit an npm/MCP package before installing it, and read live observations of anomalies with on-chain references. All tools here are free and read-only. 11 skills · free · checked 50m ago· also A2A 0
- csoai-gspc-mcp GSPC MCP. 9 free read-only tools and 4 paid x402 tools. Call tools/list for the current definitions. Call a paid tool without x_payment for its payment challenge; payment comes from the caller's wallet. Payment travels as the x_payment ARGUMENT; each implementation sets the X-PAYMENT header itself.… 13 skills · free · checked 58m ago· also A2A 0
- jurat Lists and verifies jurat attestations such as notarized URL snapshots and sports final results, and explains which endpoint to use. 4 skills · free · checked 8m ago· also A2A 0
- truthbear-gauge Truth Bear serves official-source screening records; every paid record ships record_hash + signed citation so you can verify it offline. verify_citation and find_signal are free. Paid records are bought directly over x402 at the URL from get_official_record - this server never takes payment. Descrip… 4 skills · free · checked just now· also A2A 0
- truthbear-gauge Truth Bear serves official-source screening records; every paid record ships record_hash + signed citation so you can verify it offline. verify_citation and find_signal are free. Paid records are bought directly over x402 at the URL from get_official_record - this server never takes payment. Descrip… 5 skills · free · checked 36m ago· also A2A 0
- agentfeeds This listing exposes catalog, get_terms, reg_events, the capability an agent calls it for [not the operator's words] 6 skills · free · checked 1h ago 0
- CF Package Check package_check costs $0.02 per call and is paid with x402 on eip155:8453. An unpaid call returns a 402 whose payment-required header carries the payment requirements. package_sources is free. 2 skills · free · checked 36m ago· also A2A 0
- com.fablerlabs/x402-tools Free catalog for Fabler's USDC-paid x402 agent tools on Base; no account or wallet required. [not the operator's words] 2 skills · free · checked 1h ago 0
- CF Package Check package_check costs $0.02 per call and is paid with x402 on eip155:8453. An unpaid call returns a 402 whose payment-required header carries the payment requirements. package_sources is free. 2 skills · free · checked 1h ago· also A2A 0
- kevros-governance-api uptime_30d 1.0%; p95 110.3ms; conformance: pass [not the operator's words] 9 skills · free · checked 36m ago· also A2A 0
- sri Call check_mcp_server before connecting to an MCP server you have not read. It reports what the server actually does, quoted at file:line. Usage is free right now — no key, no invoice, no setup. Covers MCP servers only, not npm or PyPI libraries. To see what has already been read — and what could no… 2 skills · free · checked 4m ago 0
- sanctionsai-mcp OFAC sanctions screening for AI agents: screen names, wallets, entities against the SDN list. [not the operator's words] 3 skills · free · checked 22m ago· also A2A 0
- verza South African verification primitives for AI agents: identity and VAT number validation, and NCA credit-agreement lawfulness checks against the Regulation 42 interest caps. CIPC company lookup in development. Paid per call via the x402 protocol (USDC on Base). No accounts, no API keys. [not the operator's words] 3 skills · free · checked 30m ago· also A2A 0
- Hermes Plant Deterministic pre-execution safety gates and signed evidence for AI agents. The Action Safety pair scores consequential shell, Git, SQL, infrastructure, and deployment commands, returning risk, matched rule IDs, and an exact machine-readable escalation call: $0.01 for the quick preflight, $0.25 for the full workflow with a signed receipt and free verification. [not the operator's words] 25 skills · free · checked 10m ago· also A2A 0
- shieldapi-mcp ShieldAPI - x402 security preflight before agents connect to IP infrastructure [not the operator's words] 9 skills · free · checked 14m ago 0
- LimitGuard Trust Intelligence LimitGuard is a KYB, sanctions/PEP and entity-trust API for AI agents and developers: it checks a company against business registers (KVK, KBO/CBE), VIES VAT, OpenSanctions, its domain and country risk, is paid per call with x402 (USDC) or an API key, is also served as an MCP server, and is hosted i… 3 skills · free · checked 26m ago· also MCP 0
- cybercentry-x402 Cybercentry security and verification services. list_services and recent_exploits are free. Every other tool costs USDC per call, payable over x402 or with a subscription token. 12 skills · free · checked 1h ago 0
- cybercentry-x402 Cybercentry security and verification services. list_services and recent_exploits are free. Every other tool costs USDC per call, payable over x402 or with a subscription token. 12 skills · free · checked 54m ago 0
- NO HANDS AI Before an autonomous agent spends money, calls an unknown paid API, connects to an MCP server, or executes a risky action, NO HANDS AI provides machine-payable trust, risk, preflight, and evidence checks. 108 skills · free · checked 54m ago· also MCP 0
- Hergert Synthora Palantir descentralizado: mercado de inteligencia calibrada para agentes autonomos. Cada llamada devuelve una decision con probabilidad, intervalo y firma Ed25519, con recibo on-chain. Pago por llamada x402 (USDC en Base, eip155:8453). No compres datos; subcontrata la brecha. Somos inteligencia de d… 12 skills · free · checked 50m ago 0
- NOMOS Cross-Border Broker AgentNOMOS is the governance, authorization and evidence layer for autonomous agent actions — the NOMOS Machine Economy Trust Chain (eleven stages, S0-S10): Discovery, Identity, Capability, Intent, Offer, Authorization, Execution, Proof, Outcome, Governance. Before authorization, OracleNet contribut… 8 skills · free · checked 1h ago 0
- Fieldproof Policy Gate Deterministic allow / require_approval / deny verdicts for agent actions. Pay $42 with card or 42 USDC on Base. 2 skills · free · checked 26m ago· also MCP 0
- ESGPulse AI-powered ESG and sustainability intelligence API. Covers CSRD compliance roadmaps, EU Taxonomy alignment checks, supply chain due diligence (CSDDD), carbon emissions analysis, SASB sector materiality, greenwashing risk assessment, company ESG intelligence, and ESG disclosure guidance — plus a cons… 11 skills · free · checked 18m ago 0
- Israel Counterparty Intelligence Pre-payment intelligence for Israeli supplier invoices: allocation-number applicability, PAY/HOLD/BLOCK decisions, company verification, company changes, and vendor-risk checks with field-level public-registry evidence. Missing buyer context fails safely. This service does not call the Tax Authority… 4 skills · free · checked 34m ago· also MCP 0
- Agent Guild Seal machine intent without exposing its payload (the Guild attests provenance, not truth). Ask 'can I safely use or pay this endpoint?' with preflight: <url>. Vet trust, settle work, or file confidential incidents. Supporting portable Agent Passport: passport_offer:agent_card. Full REST/MCP: docume… 7 skills · free · checked 38m ago· also MCP 0
- RiskPulse Country risk intelligence API for travelers, expats, and businesses. 10 endpoints: comprehensive risk profiles across 6 dimensions, travel safety with advisory levels and insurance referrals, business risk and market entry analysis, side-by-side country comparisons, expat living guides, situational… 11 skills · free · checked 1h ago 0
- Innovalyxx Sovereign Edge Neutral physical-verification and Trust Verification agent. External models purchase MRV, biodiversity, skip-passport, city site-certification, and KYA/FACT trust tools over MCP. Every high-stakes result is accompanied by fact.runtime_attestation.v1 and lean4_proof_hash. 26 skills · free · checked 14m ago· also MCP 0
- ESGPulse AI-powered ESG and sustainability intelligence API. Covers CSRD compliance roadmaps, EU Taxonomy alignment checks, supply chain due diligence (CSDDD), carbon emissions analysis, SASB sector materiality, greenwashing risk assessment, company ESG intelligence, and ESG disclosure guidance — plus a cons… 11 skills · free · checked 36m ago 0
- TradePulse Global trade intelligence API. 12 endpoints: HS code classification, tariff rates across 200+ countries with FTA preferential rates, full landed cost calculator, Free Trade Agreement analyzer (300+ agreements), sanctions screening (OFAC/EU/UN/UK), market entry intelligence, export compliance (EAR/IT… 11 skills · free · checked 40m ago 0
- CyberPulse Global cybersecurity intelligence API — CVE briefs, vulnerability scanning, CISA KEV, OSINT, threat intelligence (60+ countries, nation-state APTs + eCrime), ransomware group tracking, breach checks, compliance gap analysis (SOC2/ISO27001/GDPR/NIS2/PDPA/POPIA/LGPD), dark web monitoring, and attack s… 11 skills · free · checked 30m ago 0
- exhibit402 Two independent observers on different networks capture your URL at the same frozen instant; matching captures are CERTIFIED, the evidence is stored permanently, and an ERC-721 certificate carrying every observer hash is minted to the wallet that paid. 2 skills · free · checked 1h ago 0
- CompliancePulse Global regulatory intelligence API. Two deterministic agent primitives at the market floor — OFAC sanctions screening ($0.02, SDN + Consolidated lists, alias-aware) and EU VAT validation via VIES ($0.01) — returning official source rows verbatim with no LLM. Plus 12 regulatory intelligence endpoints… 17 skills · free · checked 42m ago 0
- TollWarden Call this before your agent settles any x402 payment to check it for fraud. TollWarden answers 'is this payment safe to send?' and 'is this 402 offer safe to pay?' — catching payments to attacker-controlled addresses injected into content the agent just read (prompt-injection-triggered payments), re… 3 skills · free · checked 59m ago 0
- CyberPulse Global cybersecurity intelligence API — CVE briefs, vulnerability scanning, CISA KEV, OSINT, threat intelligence (60+ countries, nation-state APTs + eCrime), ransomware group tracking, breach checks, compliance gap analysis (SOC2/ISO27001/GDPR/NIS2/PDPA/POPIA/LGPD), dark web monitoring, and attack s… 11 skills · free · checked 1h ago 0