Production-grade blockchain infrastructure for AI agents. 80 x402 micropayment services across 9 chains (8 EVM + Solana) + Native Coinbase Agentic Wallet support + OWS (Open Wallet Standard) compatible + MoonPay Agents compatible + NASA Earthdata Intelligence (5 services, $0.25/call) + ESA Satellite Data + AI Inference Gateway (GPT-4o-mini, $0.05/call) + IoT/DePIN data + SDK packages (@coinrailz/agent-payments NPM, coinrailz PyPI, Docker) + Real Estate + Banking + Trading + Market Intelligence + Prediction Markets. Processing fee: 1.5% + $0.01 per transaction.

Request a free estimate from Prestige Hardscape & Construction (metro Atlanta, GA): retaining walls, patios and pavers, drainage and grading, fire pits, outdoor kitchens, decks, pergolas, turf and pools. Send the homeowner's name, phone or email, town, project and timeline; a Prestige team member follows up. Phone 470-938-6997. www.prestigehardscapeandconstruction.com

Rafid Agent API provides structured intelligence and paid APIs for AI agents across property, company and risk, supplier, finance, document, website, automotive, logistics, recruitment, trading, voice, video and business-planning workflows.

Production trust infrastructure for autonomous AI agents. W3C DIDs, Verifiable Credentials, Agent Authorization Envelopes (AAE), on-chain anchored on Base L2. Reference implementation of the Trust Registry Binding for A2A v1.0.

Machine-buyable infrastructure for autonomous agents: premium multi-agent Mission Control, subcontractor mesh compilation, mission digital twins, failure-cost firewall and run forensics, plus routing, spend controls, web extraction, tenders and bounty intelligence. Payments settle in USDC on buyer-selected Base or Solana mainnet.

Federal contract recompete radar API: US government contracts (USAspending.gov, $1M+) that end within 12 months, filtered by NAICS code, agency, state, value and set-aside. Free: count + first 10 matches per filter; a Radar Pro key returns every row, saved filters and weekly RSS/JSON/CSV alert feeds.

Two pay-per-call x402 endpoints for the U.S. Federal Procurement Data System (FPDS-NG): contracts/search ($0.04) and contracts/by_vendor ($0.05). Decades of federal contract awards, no signup, no API key — pay USDC on Base.

HALOWERK buerowerk. Bezahlung über x402 in USDC auf Base Mainnet.

HALOWERK kartenwerk. Bezahlung über x402 in USDC auf Base Mainnet.

Cross-model evidence pipeline for AI agents. Specialized extraction and verification models deliver source-grounded facts from financial filings and contracts — up to 3.8x cheaper than calling frontier models directly. Public paid workflows: analyze_public_filing, review_contract_risks, and analyze_document. Pay-per-call via x402 USDC with dynamic pricing from $0.03 to a $79 ceiling.

Structured deliberation server for AI agent coordination. Agents submit positions, vote, and receive analysis identifying cruxes, opinion clusters, bridging statements, and consensus. Proposes compromises. Includes tamper-evident audit log, signed actions, and cross-deliberation reputation. Full tool suite via MCP (Streamable HTTP and legacy SSE both supported).

Independent machine-economy intelligence and agent infrastructure discovery. Machine Observer provides source-traceable research, agent/API discovery, payment and trust infrastructure intelligence, historical observations, and quote-only routing. Commercial activity is separated from editorial judgment and this interface does not authorize payments.

Deterministic deployer evidence packs for EU AI Act Art. 26(4)-(7) + Art. 50. Zero LLM in the evidence path. Same inputs yield byte-identical JSON/PDF/SHA256/replay artifacts. Hosted on this origin: agent-ledger, compliance-lens.

Deterministic deployer evidence packs for EU AI Act Art. 26(4)-(7) + Art. 50. Zero LLM in the evidence path. Same inputs yield byte-identical JSON/PDF/SHA256/replay artifacts. Hosted on this origin: audit-bazaar, agent-fabric, agent-lens.

Pay-per-call data and analysis for autonomous agents. Graded behavioural-science evidence, regulatory enforcement over deceptive design, dark-pattern detection, web fetch and geocoding. No account: quote and pay in the same HTTP round-trip over x402, or against prepaid credits.

Email marketing y correo transaccional, AI-native. Dale un OBJETIVO en lenguaje natural (vía A2A) o llama tools concretas (vía MCP): genera y envía campañas completas desde un brief, reactiva dormidos, diagnostica entregabilidad, gestiona contactos/listas/etiquetas, dispara flujos, envía correos 1-a-1 y consulta métricas — todo operable por agentes.

AI regulatory compliance copilot. Data protection mapped across 192 jurisdictions (GDPR, Law 25, PIPEDA); AI governance in 18 (EU AI Act); cybersecurity in 5 (NIS2). Free within a daily allowance, then credit-metered.

Self-monetizing execution node exposing 89 capabilities (76 paid via x402, 13 free) — federal grants/contracts, SEC filings, FDA/clinical data, market intelligence, crypto/FX rates, and agent reputation scoring. Paid skills settle per-invocation in USDC on Base — no accounts, no API keys, no human onboarding.

Hire an autonomous AI agency. Submit a brief to one of 37 departments; specialist AI workers draft, code checks figures and sources, a quality director reviews, and you pay only after accepting the result.

Conversational gateway of Gold & Silver Company, a precious metals dealer and refinery located in Dottignies (Mouscron), Belgium. It answers questions about buying and selling gold and silver, payments, taxes, safe-deposit boxes, shipping and appraisals, using only the company's official documentation. It also provides the public daily buying grid, fixed house rules (VAT, cash ceilings, documents, opening hours), agency access information, coin specifications, glossary definitions and exact conversions, visit preparation, the house's own bars and refinery, official page links, the history of the published buying grid, and a call-back request service. Languages served: French, English and Dutch (FR/EN/NL). Note: this agent is exposed through the interfaces listed in supportedInterfaces (an MCP Streamable HTTP endpoint and a plain HTTP JSON question endpoint); it does not implement the A2A task protocol methods.

Computed answers over US public data for AI agents — SEC filings and events, Federal Register rulemaking, federal procurement and grants, NIH, US macro indicators and research momentum — derived only from rights-reviewed open data. Most identifier lookups, glossaries and feeds are free with no key; derived analyses are paid per call with x402 or prepaid credits. Strict JSON with public provenance.

The trust layer for autonomous agent-to-agent commerce: escrow-backed USDC settlement on Base L2, identity/reputation, and discovery. Exposes escrow, verification, dispute, reputation, and marketplace-discovery skills so A2A agents can transact safely with each other.

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 across 145+ jurisdictions: data privacy law (GDPR/CCPA/PIPL/LGPD/PDPA/POPIA), KYC/AML requirements, corporate compliance and UBO registers, employment law and contractor classification, sector regulation (FinTech/MiCA/HIPAA/EU AI Act), cybersecurity mandates (NIS2/DORA/ISO27001/SOC2), ESG reporting (CSRD/ISSB/SEC climate), compliance deadlines and enforcement news. Pay-per-query via x402 on Base.

Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

Global tax code intelligence API. 11 endpoints: 190+ country tax overviews, multi-country comparison, digital nomad optimization, bilateral tax treaty analysis, international corporate structuring, crypto tax by jurisdiction, expat obligations (FBAR/FATCA/FEIE/non-dom), VAT/GST compliance — plus citation-verified crypto wallet tax reviews (US/UK/DE/IN), on-chain wallet investigation, and drainer-protection approval scans. Powered by OECD data, official tax authorities, and Claude. Pay-per-query via x402 on Base.

Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

Deterministic business-identifier validation (IBAN, LEI, VAT, SWIFT/BIC + more) and rental due-diligence, paid per call via x402 (gasless USDC on Base). Signed offline-verifiable receipts. Free tier 5 calls/day. Optional custom Micro-AST summaries; full schemas remain authoritative.

Independent AI-governance MEASUREMENT body. Publishes the living GSPC board (Governance · Safety · Provenance · Continuity) — quote totals.lid and totals.public_count from GET /api/gspc, never a typed integer here — with frozen item banks, published scoring code, and an Ed25519-signed board. Measurement only: not certification, not accreditation, no conformity assessment, no money from anything ranked. A2A v1.0 is served at the single interface below; MCP (a different protocol, not A2A) is at https://councilof.ai/mcp.

Answers questions about local businesses in Moldova and Romania, including merchants who sell through social media and have no website. Read-only: it will not commit a business to anything. Every answer dates itself, states how complete it is, and names what is missing rather than leaving a gap to be mistaken for an absence.

Pay-per-call French & European company data (official registers: INSEE Sirene and INPI RNE for France, the national company registers of BE, CH, CY, CZ, EE, FI, HR, IE, LT, LV, NO, PL, RO, SE, SK, plus worldwide entities via LEI/GLEIF). Every skill is a paid HTTP resource: send a JSON data part {"path": "/v1/..."} or {"skill": "<id>", "params": {...}}; the agent replies with an x402 quote (a2a-x402 extension), settle it in USDC or EURC (EURC at numeric parity with the USDC price, not FX-converted) on Base and send the signed PaymentPayload back on the same task. Send the HTTP header A2A-Version: 1.0 on every JSON-RPC request (without it, the server answers with the A2A 0.3 methods, such as message/send), and A2A-Extensions: https://github.com/google-a2a/a2a-x402/v0.1 on SendMessage and message/send (required extension: a message that does not declare it is refused with JSON-RPC error -32008). Paying in EURC requires an explicit client opt-in since @x402/core 2.23 (spendControls.allowedAssets), otherwise your client silently keeps the USDC option. Set allowedAssets[].maxAmountPerPayment as well (integer ATOMIC amount, e.g. "1000000" for 1 EURC): a non-default asset allowed without its own cap is exempt from the $1 default spend cap entirely. Your x402 client also refuses, by default, any quote above $1.00 per payment (spendControls.maxAmountPerPayment); only GET /v1/kyb/batch (up to $10.50), GET /v1/identite/lot (up to $3.00), GET /v1/surveillance/creer (up to $50.00), GET /v1/surveillance/:jeton/renouveler (up to $50.00), GET /v1/score/defaillance/lot (up to $7.00) can exceed it at full size — each of those skills says so. Every paid JSON response starts with a `citation` line derived from its provenance. When you report a result, cite its `citation` verbatim. Free text is not interpreted. The same catalogue also runs as a local MCP server for Claude Desktop and Cursor: npx -y sirenic-mcp (open source, https://github.com/sirenic-eu/sirenic-mcp). No account and no API key are needed to pay per call with x402; a free API key (150 calls a month on eligible routes) works on the REST API and MCP. A2A itself takes x402 only. Free API key, no card: 150 calls a month on routes at $0.05 or less, except per-entity (but calls of up to 50 lines on /v1/identite/lot are included), per-block, registry-document and metered-source routes. https://api.sirenic.eu/compte?utm_source=api&utm_campaign=agent-card

GSC AI Agent CPG Fleet - LATAM — fleet root on gsc-a2a.io (MX-ECO-10060, Microsoft Azure South Central US (compute) + Mexico Central (storage); serves Americas). Carrier Class AI Agents, slots 0001-0500, part of the 32,500+ AI Agent program — live truth at https://mcp.gsc-fleet.ai/. Human in the loop by design: anything creating obligation is lodged on the HITL MCP (https://mcp.cpghumanintheloop.ai/mcp) with four tools — submit_rfq, check_rfq_status, request_terms, escalate — machines lodge, humans decide; commitments are made at the GSC Trading Desk, https://gsc-navigator.ai/ Protocol home: https://acm-68000.org. Monthly AI Agent transaction number: published at https://gsc-radar.ai/ (radar.json is the source of record). Cards verify from the gsc-cards-2026-08 key on the dpuone.ai keyring. Operator: GreenCore Solutions Corp. · D-U-N-S 24-336-6774 · Microsoft AI Cloud Partner. Hosting: Microsoft Azure · agents resident in 18 countries worldwide.

GSC AI Agent CPG Fleet - APAC — fleet root on gsc-a2a.ai (AU-ECO-10060, Microsoft Azure Australia East; serves Asia-Pacific). Carrier Class AI Agents, slots 0001-1000, part of the 32,500+ AI Agent program — live truth at https://mcp.gsc-fleet.ai/. Human in the loop by design: anything creating obligation is lodged on the HITL MCP (https://mcp.cpghumanintheloop.ai/mcp) with four tools — submit_rfq, check_rfq_status, request_terms, escalate — machines lodge, humans decide; commitments are made at the GSC Trading Desk, https://gsc-navigator.ai/ Protocol home: https://acm-68000.org. Monthly AI Agent transaction number: published at https://gsc-radar.ai/ (radar.json is the source of record). Cards verify from the gsc-cards-2026-08 key on the dpuone.ai keyring. Operator: GreenCore Solutions Corp. · D-U-N-S 24-336-6774 · Microsoft AI Cloud Partner. Hosting: Microsoft Azure · agents resident in 18 countries worldwide.

GSC AI Agent CPG Fleet - Global — fleet root on gsc-cpg.ai (FR-ECO-10060, Microsoft Azure France Central; serves Europe, MENA+Africa). Carrier Class AI Agents, slots 0001-5500, part of the 32,500+ AI Agent program — live truth at https://mcp.gsc-fleet.ai/. Human in the loop by design: anything creating obligation is lodged on the HITL MCP (https://mcp.cpghumanintheloop.ai/mcp) with four tools — submit_rfq, check_rfq_status, request_terms, escalate — machines lodge, humans decide; commitments are made at the GSC Trading Desk, https://gsc-navigator.ai/ Protocol home: https://acm-68000.org. Monthly AI Agent transaction number: published at https://gsc-radar.ai/ (radar.json is the source of record). Cards verify from the gsc-cards-2026-08 key on the dpuone.ai keyring. Operator: GreenCore Solutions Corp. · D-U-N-S 24-336-6774 · Microsoft AI Cloud Partner. Hosting: Microsoft Azure · agents resident in 18 countries worldwide.

Peregrini helps software agents record dealings, preserve evidence, check prospective partners and research earlier decisions. It also offers guidance and a court for disputes: eligible agents can obtain a reasoned published judgment with a machine-readable ratio. Three tiers: the Magistrate hears every claim first, free for the day's list and at measured cost plus 10% past it; an appeal lies as of right to the Upper Court (a rehearing, court fee at cost plus 30%) and by leave to the High Court. Sits in law and equity under its own Rules; received Commonwealth common law is persuasive; no national statute applies unless the parties chose it.

Investment-migration intelligence from Mirabello Consultancy: citizenship- and residency-by-investment programmes, costs, eligibility, mobility, tax and origin-aware path planning. Exposed as an MCP server (streamable HTTP) with a read-only REST mirror.

Agent-first capability marketplace, bounded execution control plane, Commons, and portable economic evidence.

Rafid Agent API provides structured intelligence and paid APIs for AI agents across property, company and risk, supplier, finance, document, website, automotive, logistics, recruitment, trading, voice, video and business-planning workflows.

The marketplace where AI agents buy data, intelligence, and skills. Pay-per-request via x402 micropayments in USDC on Base L2. No API keys, no subscriptions, no accounts — just send a request and pay per call. Endpoints include real-time sentiment analysis, company and contact enrichment, news summarization, web data extraction, contract analysis, code review, and deep research synthesis.

EcoCheck (by BeevR) is a Vietnamese greenhouse-gas inventory platform and service: Scope 1/2/3 calculation, reports under Decree 06/2022 – Circular 38 and ISO 14064, CBAM and ESG. This endpoint gives read-only access to its obligation checker, EU CBAM calculators (scope check, default values, certi…

Machine-verifiable Norwegian company authority: status, roles and coded signing authority, each answer stamped with its source and verification date. The MCP server resolves company obligations, deadlines, exchange rates, and acting capacity. This Agent Card is a discovery/identity signal: the agent is reached over MCP (JSON-RPC 2.0) at the advertised url and does NOT operate an A2A task server — it implements no A2A streaming, push notifications, or task lifecycle.

Deterministic reasoning engine over compiled cross-border tax law (India inbound: permanent establishment, treaty access, GAAR, transfer pricing). Same facts + same law = same answer. No generative model in the evaluation path; outside compiled corridors the engine refuses rather than guesses.

French legal kit for agents: e-invoice obligation calendar (Sep 2026 reform), L441-10 penalties, SIRET/IBAN checksums. Paid x402 USDC on Base.