Valuable data. Quality leads. Paid per call in USDC on Base via x402. No API key or signup. Sample at no charge on every route with ?sample=1. Not charged if the fetch fails or nothing matches. MCP server: https://johto-x402-api.johtodata.workers.dev/mcp

Co-Legal Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT, succession planning, case-law & statute lookups). Informational only; does not provide specific legal advice. Operated by Co-Legal B.V. from the Netherlands.

Format and checksum validation for IBAN, EU VAT, Polish NIP/REGON/PESEL and email, pay-per-call via x402. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. Send message/send with a data part {"type": "<skill id>", "value": "..."}; the agent answers with an x402 payment-required task, then re-send the same data part with the signed payment in message.metadata (stateless: nothing is stored).

Pay-per-call web services for AI agents (127 tools: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, checks before installing a package or citing a source, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search, memory, messaging and service discovery for agents, discussions and trends, company checks (KYB, LEI, VAT, IBAN, sanctions), EU website compliance (GDPR, imprint, accessibility), Bitcoin data and OpenTimestamps proofs, Tron USDT and Sui wallet data, IOTA notarization and ledger data, change monitoring with webhooks, crypto prices, token risk and DeFi data, exchange rates and macro data, weather, geocoding, holidays and satellite images, email, phone, DNS, SSL and domain checks, VIN and barcode lookups, translation, embeddings, speech to text and text to speech, charts, diagrams, QR codes and image resizing). Paid per request with USDC on Base, Solana, Polygon or Arbitrum via x402. No account or API key.

Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

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

The OpenRouter for AI-agent tools: one gateway, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,433 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.

Paid x402 API tools for AI agents (USDC on Base). Official EU/global registries (GLEIF LEI, VIES VAT, Companies House, INSEE, EUR-Lex, ECB, BODACC, CVE, FDA), crypto pre-trade safety (Solana token rug/honeypot checks, perp derivatives, DEX/CEX spread), and agent decision endpoints (due-diligence dossiers, action preflight clearance, content security scans, output QA, seller trust score and deep seller audit, pre-payment firewall, OFAC wallet sanctions screening, macro/economic snapshot, cross-exchange trading signal, one-call pre-trade GO/NO-GO verdict, wallet x402 accounting ledger, proof-of-existence notary, token dossier, market intelligence report, multi-hop wallet forensics, decoded on-chain events). Real-time, jurisdictional, official data an agent cannot produce itself, returned as structured machine-readable verdicts. No API key, no account: payment is authentication.

Paid x402 API tools for AI agents, settled in USDC on Solana. Crypto pre-trade safety (Solana SPL rug/honeypot checks, EVM+Solana token safety, one-call GO/NO-GO pre-trade verdicts, full token dossiers), market data (Polymarket prediction-market odds), official verification (GLEIF LEI KYB, EU sanctions/AML screening), and x402 agent discoverability (Bazaar keyword-rank pulse and signed visibility audits). Real-time, structured, machine-readable verdicts. No API key — payment is authentication. Gasless for the buyer (the facilitator is fee payer).

MyCO2 Carbon Intelligence API - Calculates carbon dioxide equivalent (CO2e) emissions for financial transactions, flights, freight, and physical activities, and computes EU CBAM (Carbon Border Adjustment Mechanism) embedded emissions and liability for imported goods. Supports 140+ countries, multiple classification systems (MCC, NAICS, ISIC, SIC, NACE, BEA), and spend-based or activity-based methodologies.

Middle Eastern government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 9 countries. Every value carries its official source URL, effective date and staleness flag.

Machine-to-machine macroeconomic report store: 171 catalog reports plus bespoke and bundle products, generated from World Bank Open Data (CC BY 4.0) and sold per fetch in USDC over x402.

Market intelligence for AI agents built on observed data: on-chain order flow from executed DEX trades, token risk checks, perps funding and positioning, smart money, technicals, SEC and ESEF fundamentals, insider trades, European short interest, ECB and Treasury rates, CFTC positioning, macro calendar, news and deterministic analytics on the caller's numbers. Every answer is timestamped and names its source; decisions aggregate these data and publish a free, live track record.

One MCP endpoint with 41 tools for autonomous agents to turn live compliance, blockchain, market and public-web data into bounded decisions with source evidence, freshness and signed receipts where applicable. Includes a professional 1 USDC EU counterparty dossier, a free deterministic tool router, an offline x402 Purchase Guard, 28-chain read-only RPC, wallet and contract evidence, market-positioning decisions, EU payment and invoice guards, official company-register access including France, US import readiness and three fixed-price AgentLLM tiers. Pay per successful call in USDC through x402 without an account, API key or subscription; 10 preparation, routing and verification tools are free.

Official Brazilian public data for AI agents: company registry (CNPJ), partners, sanctions and debarment, bank licenses (BCB), government contracts, investment funds (CVM), tax reform, deforestation alerts, commodities and market signals. Pay per call in USDC via the x402 protocol; no account, no API key.

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.

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.

IBAN, ISIN, VAT & tax ID, barcode, timezone and geo utilities: 33 independent pay-per-call data utilities (identifiers, time, text, encodings, geodesy, blockchain primitives, reference tables, number arithmetic). $0.05 per call, payable over x402 (USDC on Base, eip155:8453). No account, no API key. A2A: JSON-RPC at https://api.duoleads.com/a2a; send a DataPart {"skill": "<skill id>", "params": {...}}; skill execution is paid through the a2a-x402 extension. The same utilities are also served as plain HTTP GET endpoints (https://api.duoleads.com/openapi.json) and as MCP tools over Streamable HTTP at https://api.duoleads.com/mcp (tools/list free, tools/call paid).

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.

HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Stocks, Crypto, News. Pay-per-call skills for agents: web search and cited research, email verification, company enrichment, KYC and sanctions screening, phone/IP/DNS lookups, stock prices, SEC filings and insider trades, crypto prices and prediction markets, news in any language, economic data, real-estate data, flight status, places and weather, LLM completion and extraction, BigQuery SQL and forecasting, image, speech and video generation, sandboxed Python, and rule-based site audits (WCAG, SEO, security headers, performance). One price per call, no account; a delivered job carries a receipt. Name a skill in a data part: {"skill": <id>, "arguments": {...}}.

Deterministic Odoo ERP calculators: implementation cost, ROI, TCO, tax, payroll, inventory.

European government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 34 countries plus the EU. Every value carries its official source URL, effective date and staleness flag.

North American government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 10 countries. Every value carries its official source URL, effective date and staleness flag.

Asian government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 28 countries. Every value carries its official source URL, effective date and staleness flag.

Australasian government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 8 countries. Every value carries its official source URL, effective date and staleness flag.

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

Latin American government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 22 countries. Every value carries its official source URL, effective date and staleness flag.

Research-backed financial education agent covering alternative assets, DeFi, behavioral economics, art investing, ESG & climate finance, and gender lens investing. Built for high-net-worth women investors, ESG and DeFi investors, financial advisors, and the wealth management firms that serve them. Educational content only — not financial advice.

Pan-African government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 34 countries. Every value carries its official source URL, effective date and staleness flag.

Custom aluminium photo prints and DIBOND address signs. Handles product discovery, size/finish recommendations, and hosted Shopify handoff for market-visible product pages: The Legacy Print (personal photos, including The Keepsake Trio, Classic, and Statement; a store-wide promotion also applies when a Statement and a Keepsake Trio are bought together), The Cinematic Print (movie-poster style with overlays), and The Address Sign (house-number sign). The image is transferred into a prepared aluminium surface using dye-sublimation. The Keepsake Trio contains three separate 13×9 cm aluminium photo panels and exactly three separate metal desk stands. Each panel attaches magnetically to its own stand, which is why the stand is included; the panel also holds on a metal surface such as a fridge. Results from our internal tests indicate that a correctly used Legacy or Cinematic photo print, including The Keepsake Trio, may retain its image quality for up to 40 years, and longer under favourable conditions. Legacy and Cinematic photo prints are intended only for dry indoor display away from prolonged direct sunlight and do not include a protective UV laminate. Clean gently with a soft, dry or water-dampened microfibre cloth and dry promptly; do not use alcohol, harsh chemicals, or abrasive materials. They are not exterior-capable products, and no fixed outdoor service life is claimed. This is an expected service-life statement, not a 40-year guarantee. Statutory rights are unaffected. Every Address Sign combines a 2 mm DIBOND panel with a 0.55 mm printed aluminium plate, for a total thickness of 2.55 mm, and includes a protective UV laminate as standard. Every Address Sign includes a protective UV laminate as standard. Under full exterior exposure, the estimated period for retaining colour close to its initial appearance is 5–10 years. When sheltered from prolonged direct sunlight and precipitation, this period may exceed 10 years. Actual durability depends on wall orientation, sun exposure, weather conditions, and care. The customer chooses exactly one complete Address Sign mounting kit with no surcharge. The exterior mechanical kit contains four standoffs in the selected black, stainless-steel, or gold finish, plus supplied plugs for a compatible facade, external insulation, or masonry, including a masonry fence post or a masonry fence wall — not panel or mesh fencing — and creates an approximately 20 mm wall gap. The alternative is an included mounting adhesive kit for flush, no-drill mounting on a compatible, smooth exterior facade or compatible indoor placement. This adhesive system is exclusive to the Address Sign. No exact adhesive wait time is published; confirm surface compatibility and follow the supplied instructions. Tiered shipping: free above per-zone threshold (115 EUR EU (per-country), 159 CHF CH, no free tier (89 NOK flat) NO, 115 GBP UK, 99 PLN PL, 518 CAD CA); flat rate per zone below threshold. Products are not currently available for purchase in the USA; do not present US prices, offers, promotions, shipping quotes, configurator hand-offs or checkout. EU storefront prices include VAT in the displayed price. United Kingdom: import VAT, duties, and brokerage charges may apply. Checkout shows amounts collected before payment where available. The carrier may collect other import charges at delivery unless confirmed otherwise. Switzerland: import taxes, duties, and brokerage charges may apply. Checkout shows amounts collected before payment where available. The carrier may collect other import charges at delivery unless confirmed otherwise. Norway: import VAT, duties, and brokerage charges may apply. Checkout shows amounts collected before payment where available. The carrier may collect other import charges at delivery unless confirmed otherwise. Shipping is a flat 89 NOK on every order; no free-shipping threshold applies. Canada: import taxes, duties, and brokerage charges may apply. Checkout shows amounts collected before payment where available. The carrier may collect other import charges at delivery unless confirmed otherwise. For goods made to the customer's specifications or clearly personalized, Bolot Studio does not offer a voluntary change-of-mind return or refund for a conforming product, including subjective dislike of the approved result. Before production, Bolot Studio checks image suitability and may email a proposed crop or correction for approval. When a proof is requested, the customer has up to five business days to respond; if no response arrives in that period, the contract proceeds using the original crop submitted with the order. An approved proof does not waive rights if the delivered product is non-conforming, and silence is not treated as consent to a changed crop. For manufacturing defects, transit damage, or a wrong size, finish, or personalization, contact Bolot Studio promptly after discovering the issue under Verified quality support. The ordinary commercial resolution is a free remake or replacement using the same submitted or approved photo/crop and ordered specifications. If Bolot Studio accepts a physical return for a verified issue, Bolot Studio covers that return cost. Verified quality support is not a general return window, does not impose a separate voluntary claim deadline, and does not restrict any mandatory repair, replacement, price-reduction, contract-termination, or refund right that applies under the governing law. Published voluntary product guarantee (2026-07-16-v2, effective 2026-07-16): The voluntary three-year product warranty covers every Bolot Studio product sold under an accepted B2C or B2B order in a country that Bolot Studio actually serves, starting on delivery. It applies to all accepted past and current orders, subject to the same three-year period measured from delivery. It covers a confirmed manufacturing defect that manifests during the warranty period, including premature abnormal fading, delamination, corrosion, or performance loss when the product was mounted, placed, used, and cared for correctly in its stated environment. Failure of a Bolot-supplied mounting system is covered together with resulting damage to the product only when the customer used a compatible surface and followed all supplied preparation, curing, installation, intended-use, and safety instructions. Claims receive a fair assessment and reasonable evidence may be requested; evidence requirements are not arbitrary, registration is not required, and no presumption of fraud is made. Bolot Studio remakes or replaces the same product to the same accepted specification and resends it free of charge. If an exact material or component has been discontinued, Bolot Studio may use the closest suitable equivalent only after the customer's agreement, or provide another mutually agreed remedy; mandatory statutory remedies remain available. Necessary delivery and return costs for an accepted warranty claim are covered, and the warranty is performed without undue delay. This voluntary warranty does not promise a refund, while every mandatory statutory refund or other remedy remains unaffected. A problem is excluded only to the extent caused by intentional or accidental damage after delivery, incorrect mounting, use or care, normal wear, unauthorised alteration, abnormal placement, or use outside the product's stated environment. Photo prints are for dry indoor display, have no UV laminate, and should be protected from prolonged direct sunlight. Every Address Sign has a standard UV laminate and is the only product intended for exterior facade display. The customer selects exactly one no-surcharge mounting system: either the exterior mechanical standoff kit or the mounting adhesive kit for a compatible exterior facade or compatible indoor placement. Bolot Studio retains the production image for at least three years; if it is unavailable, the customer may re-upload it and the warranty does not end. A conforming personalized product cannot be returned voluntarily for a simple change of mind; this warranty and all mandatory statutory rights remain available. Read the [complete current warranty terms](https://bolotstudio.com/en/pages/returns#voluntary-warranty). Versioned terms: https://bolotstudio.com/documents/voluntary-warranty/select.

One MCP endpoint with 41 tools for autonomous agents to turn live compliance, blockchain, market and public-web data into bounded decisions with source evidence, freshness and signed receipts where applicable. Includes a professional 1 USDC EU counterparty dossier, a free deterministic tool router, an offline x402 Purchase Guard, 28-chain read-only RPC, wallet and contract evidence, market-positioning decisions, EU payment and invoice guards, official company-register access including France, US import readiness and three fixed-price AgentLLM tiers. Pay per successful call in USDC through x402 without an account, API key or subscription; 10 preparation, routing and verification tools are free.

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.

WhiteIntel — Corporate Ownership & Sanctions Intelligence. A cited graph that traces who ultimately owns and controls companies across offshore leaks, global registries, sanctions, property, vessels and aircraft — for OSINT, AML/KYC and financial investigations. Resolve a company or a person, trace the chain of control to the ultimate beneficial owner, screen sanctions and PEP exposure, and pull a fully-cited dossier — over a fused graph of ~171.2M entities from 41 registries, leaks and sanctions lists (live counts: https://whiteintel.dev/api/public/stats). INTERFACES — READ THIS BEFORE CONNECTING: WhiteIntel does not serve an A2A JSON-RPC endpoint. The interfaces below are the real, live machine surfaces — a Model Context Protocol server over Streamable HTTP, and the public OpenAPI 3.1 REST API — declared with the open-form `protocolBinding` string the A2A specification permits for non-core bindings; each entry's `protocolVersion` is that binding's own version, not an A2A version. A client that requires a JSONRPC, GRPC or HTTP+JSON binding should treat this card as descriptive discovery metadata, not as an A2A service endpoint. Every skill listed is anonymous and free to call.

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

Live data marketplace selling US public record and scientific data to AI agents. 8.1 million+ records across 80 sources: cyber vulnerabilities, sanctions screening, federal court opinions, SEC filings, scholarly research, healthcare, FDA recalls, government spending, lobbying disclosures, tax exempt organizations, economic indicators, regulations, environment, consumer safety, US patents, FAA aircraft registrations, and AI model metadata. Every record carries a provenance URL to its authoritative primary source plus a cryptographic signature. Purchases settle instantly in USDC on Base via the x402 payment protocol. Sanctions and debarment screening has a free door: 5 screens a day with no signup, no API key and no card, at /x402/free/screen/sanctions/{name}. Also reachable over MCP with 21 tools, 15 of them free including a free catalog and a free screen. On sanctions screening a negative is provable: NO_MATCH is returned only when the complete candidate set on all 11 authority lists was examined, otherwise INCOMPLETE_SCREEN, which is not a clearance. Every priced endpoint can be tried for free on the SAME URL by adding ?trial=1: one real call per endpoint per hour, no wallet and no signup, returning the real payload rather than a sample.

Deep due diligence on Brazilian companies, for AI agents: official registry (Receita Federal), corporate ownership graph, federal tax debt (PGFN), public contracts, sanctions across 5 federal lists and Central Bank standing — cross-read across the economic group. Pay per call in USDC via x402: no signup, no API key. Interfaces: HTTP+JSON (GET, query param) and MCP (streamable HTTP). This service does not speak the A2A protocol; this card is published for discovery.