Novarithm · Partenaire de croissance IA pour PME
https://api.novarithm.com/agents/v1/agent/a2a-cardNovarithm installe l'IA dans votre entreprise : elle répond à vos clients, trouve de nouveaux clients et fait le répétitif. Payés sur vos résultats.
Paid verification
How it worksNo sponsored paid call yet.
Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.
Quality grade
How grading works- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
x402 readiness
Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B+, 67.6/100), which weighs availability, payability and on-chain demand. How the two differ
| Valid payment requirements | 10/10 | Payment requirements carry a payee, a mainnet network and a price. |
| Live 402 challenge | 25/25 | Paid endpoint answers with an HTTP 402 challenge (450 ms). |
| x402 version | n/a | x402 version not observed yet. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 9/9 probes succeeded over 30 days (100%). |
| Resource declaration | 10/10 | Declares 1038 paid resource(s). |
| Verified identity | 5/10 | Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control. |
| Freshness + modern flags | 5/5 | seen in a source within 7 days; declares x402. |
| Security declaration | n/a | Payment is the access control for an x402 resource. |
Compared with peers
Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.
- Readiness
- Higher than 94% of peers
- This listing 93 · peer median 78
- Latency
- Faster than 23% of peers
- This listing 450 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- Verified identity −5
— Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Paid endpoints
1038 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.
https://api.novarithm.com/agents/v1/site/audit-quick
Quick Bierus website audit (audit-live engine, 6 steps): reads the site, asks AI assistants (Google AI Mode/Overview, ChatGPT, an LLM), checks online reputation, Lighthouse mobile speed and security headers, then writes findings with evidence and a PDF report (EN/FR). Async: job_id + free result_url
https://api.novarithm.com/agents/v1/site/audit-full
Full Bierus v2 website audit: ~40 stable control ids (ok / ko / not measured / not applicable) with dated sources: reputation, checkout path (stops at the payment page), reviews and claims, AI visibility, DNS/e-mail auth, JS key leaks, passive security, Lighthouse mobile; guarded French PDF report (
https://api.novarithm.com/agents/v1/proof/website
Signed passive website proof: page reachable, TLS certificate, http→https, response time, title, mixed content, real 404, internal links sample, optional expected text. ok/ko/not_measured + EIP-712 attestation.
https://api.novarithm.com/agents/v1/proof/seo
Signed passive SEO proof: SEO module scores (technical, content, links, local, AI visibility), title/meta lengths, canonical, single h1, lang, JSON-LD, indexable, sitemap. ok/ko/not_measured + EIP-712 attestation.
https://api.novarithm.com/agents/v1/proof/security-basics
Signed PASSIVE security basics: TLS 1.2+, certificate expiry, HSTS, CSP, framing, nosniff, referrer policy, version disclosure, cookie flags, known-vulnerable JS versions in script URLs, mixed content, SPF/DMARC, security.txt. No scanning.
https://api.novarithm.com/agents/v1/proof/checkout
Signed passive checkout-path proof for a store or product page: price/currency/availability, add-to-cart control, cart page, checkout links over https, payment provider, terms/returns/privacy/legal pages reachable, contact. Nothing added to cart, no payment.
https://api.novarithm.com/agents/v1/proof/delivery
Full signed delivery verification: website + SEO + security basics (+ checkout if store=true) + the client's acceptance criteria (expected texts, pages that must answer). One verdict pass/partial/fail and one EIP-712 attestation over all measurements. Async: job_id + free result_url.
https://api.novarithm.com/agents/v1/trust/provider
Trust decision (trust/caution/avoid + score) for one paid agent provider: x402 offer, MCP, A2A card, 3 unpaid availability probes, domain reputation, OFAC check of payTo, ERC-8004 identity and agentWallet = payTo on Base.
https://api.novarithm.com/agents/v1/trust/compare
Compare 2-5 paid agent providers with the same measured checks and rank them (decision, budget, trust score, price, latency); returns the recommended provider and why.
https://api.novarithm.com/agents/v1/seller/due-diligence-report
Readable vendor due-diligence report: reputation, sanctions (OFAC/UN/EU/UK), product recalls, EU-Ready, email authentication, product offer; proceed/review/block, Markdown report, signed evidence hash. Async if slow (job_id + free result_url), cached 24 h.
https://api.novarithm.com/agents/v1/geo/us-address
Geocode one US street address with the U.S. Census Bureau: standardised address, lat/lon, state, county, census tract, block group, ZCTA, metro area, congressional district (official GEOIDs). No match = not charged.
https://api.novarithm.com/agents/v1/geo/uk-postcode
UK postcode lookup (ONS Postcode Directory via postcodes.io): lat/lon, country, region, local authority, ward, parliamentary constituency, NHS ICB, police force, LSOA. Unknown postcode = not charged.
https://api.novarithm.com/agents/v1/agent/a2a-card
Fetch and validate a peer agent's A2A Agent Card (v1.0 / v0.3): fields, skills, interfaces, auth, signature, reachability. Score 0-100 + issues.
https://api.novarithm.com/agents/v1/agent/mcp-probe
Real MCP Streamable HTTP handshake (initialize + tools/list, no tool call): reachability, protocol version, tools, schemas, latency, OAuth metadata.
https://api.novarithm.com/agents/v1/agent/x402-probe
Pre-payment check of an x402 endpoint: one unpaid request, decodes the 402 offer (v1/v2): network, USDC or not, USD price, payTo, testnet, red flags.
https://api.novarithm.com/agents/v1/doctor/diagnose
Diagnose another agent's discoverability: robots.txt rules against the main AI crawlers, llms.txt, A2A agent card and its mandatory fields, MCP manifest, OpenAPI with x402 payment metadata (structured price, protocols, declared 402), and optionally a live 402 challenge on a given endpoint. Returns a
https://api.novarithm.com/agents/v1/doctor/repair-kit
Repair kit for another agent: diagnoses it, then returns ready-to-paste files — a complete llms.txt, a valid A2A agent card, the exact x-payment-info block and 402 response declaration that directories require, and the robots.txt rules to unblock GPTBot, ClaudeBot, PerplexityBot and the others. Buil
https://api.novarithm.com/agents/v1/doctor/upgrade-plan
Upgrade plan for another agent: the same diagnosis turned into an ordered, prioritised work list, each item stating the concrete effect on discovery or conversion (why a missing /openapi.json means noDiscovery, why a 400 instead of a 402 loses the endpoint in a directory probe, why a time pass beats
https://api.novarithm.com/agents/v1/monitor/subscribe-1d
Subscribe one agent to monitoring for 24 hours: an immediate first measurement plus one deterministic re-check, with history and regression alerts. Returns a sub_id and a token; read your state for free at /agents/monitor/status. Use it to test the service on one agent before committing to a longer
https://api.novarithm.com/agents/v1/monitor/subscribe-7d
Subscribe one agent to monitoring for seven days: an immediate first measurement then one re-check per day, with full history and regression alerts (score drop, a document that disappeared, a broken 402 challenge, new OpenAPI defects). Built for the same agents that poll us: it is cheaper and more u
https://api.novarithm.com/agents/v1/monitor/subscribe-30d
Subscribe one agent to monitoring for thirty days: thirty daily deterministic re-checks with history and regression alerts. The cheapest per-check horizon; for an operator running several agents or an index that must stay discoverable.
https://api.novarithm.com/agents/v1/agent/ready-score
Agent-ready score 0-100 (A-F) of a website or API: AI-bot access, llms.txt, A2A agent card, MCP manifest, x402 discovery, OpenAPI and agentic-commerce markup, with fixes ranked by impact.
https://api.novarithm.com/agents/v1/repair/priority
The worst discoverability failures currently measured across real x402 origins: score, verdict, missing documents (llms.txt, A2A card, MCP manifest, openapi.json), blocked AI bots, OpenAPI defects, and the concrete ordered fixes. For an operator or directory that wants to know who to help, partner w
https://api.novarithm.com/agents/v1/repair/scan
The full repair map: every scanned origin with its score, missing documents, blocked bots, openapi defects and fixes, plus a histogram of the most common failures across the market. Sell it to aggregators, directory operators and anyone building on x402 who needs to know the health of the ecosystem.
https://api.novarithm.com/agents/v1/certify/sign
Measure one agent and receive a signed, transportable attestation of its discoverability. Publish it on your site or give it to a directory: anyone can verify it offline via POST /agents/certify/verify (free). This is the difference between saying 'my agent is agent-ready' and proving it, dated and
https://api.novarithm.com/agents/v1/clones/blueprint
Architecture plan + installation checklist for one AI-run business: clone=agency (AI sales-agent agency), trading-house (AI B2B trading house) or api-store (API store for AI agents). Components, data flows, build phases, done-when checklist, go-live checks. No source code, no revenue promise. Unknow
https://api.novarithm.com/agents/v1/email/check
Validate one email address without sending mail: syntax, MX, disposable, free webmail, role account, SPF/DMARC. Returns deliverable/risky/undeliverable/invalid with score.
https://api.novarithm.com/agents/v1/email/domain-health
Audit a domain's email authentication: MX, SPF, DMARC, DKIM (20 selectors), MTA-STS, TLS-RPT, BIMI and domain age. Returns an A-F grade with concrete fixes.
https://api.novarithm.com/agents/v1/escrow/evaluate
Evaluate a deliverable (text, JSON or URL) against a job spec (free text or JSON criteria): verdict pass/partial/fail, score, checked criteria, and a signed EIP-712 attestation whose digest is the ERC-8183 complete/reject reason. No funds held.
https://api.novarithm.com/agents/v1/escrow/verify
Verify an attestation token issued by evaluate_deliverable: recovers the EIP-712 signer, checks it is our evaluator, returns verdict, score, jobId and the bytes32 reason.
https://api.novarithm.com/agents/v1/checkout/eu-ready
Before buying or selling a product in the EU: Safety Gate alerts (barcode or brand+words), GPSR manufacturer / EU responsible person on the page, seller sanctions (OFAC/UN/EU/UK) and price at the ECB rate, with a ready/review/block decision.
https://api.novarithm.com/agents/v1/fragrance/authenticity
Risk signals for a fragrance listing: sales channel, price per ml, listing words, seller domain and EU Safety Gate. Does not authenticate a physical bottle. Provide url, or brand and seller_domain.
https://api.novarithm.com/agents/v1/fx/eur-usd
Official EUR/USD reference rate: latest European Central Bank fixing (or the official peg when USD is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/eur-gbp
Official EUR/GBP reference rate: latest European Central Bank fixing (or the official peg when GBP is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/eur-jpy
Official EUR/JPY reference rate: latest European Central Bank fixing (or the official peg when JPY is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/eur-chf
Official EUR/CHF reference rate: latest European Central Bank fixing (or the official peg when CHF is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/usd-eur
Official USD/EUR reference rate: latest European Central Bank fixing (or the official peg when EUR is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/usd-gbp
Official USD/GBP reference rate: latest European Central Bank fixing (or the official peg when GBP is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/usd-jpy
Official USD/JPY reference rate: latest European Central Bank fixing (or the official peg when JPY is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/usd-chf
Official USD/CHF reference rate: latest European Central Bank fixing (or the official peg when CHF is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/gbp-eur
Official GBP/EUR reference rate: latest European Central Bank fixing (or the official peg when EUR is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/gbp-usd
Official GBP/USD reference rate: latest European Central Bank fixing (or the official peg when USD is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/gbp-jpy
Official GBP/JPY reference rate: latest European Central Bank fixing (or the official peg when JPY is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/gbp-chf
Official GBP/CHF reference rate: latest European Central Bank fixing (or the official peg when CHF is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/jpy-eur
Official JPY/EUR reference rate: latest European Central Bank fixing (or the official peg when EUR is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/jpy-usd
Official JPY/USD reference rate: latest European Central Bank fixing (or the official peg when USD is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/jpy-gbp
Official JPY/GBP reference rate: latest European Central Bank fixing (or the official peg when GBP is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/jpy-chf
Official JPY/CHF reference rate: latest European Central Bank fixing (or the official peg when CHF is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/chf-eur
Official CHF/EUR reference rate: latest European Central Bank fixing (or the official peg when EUR is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
https://api.novarithm.com/agents/v1/fx/chf-usd
Official CHF/USD reference rate: latest European Central Bank fixing (or the official peg when USD is pegged), with the rate date, the method (direct, cross via EUR or peg-derived) and the source attribution. Deterministic, sourced, no estimate.
How to call
curl -sS -i -X GET https://api.novarithm.com/agents/v1/agent/a2a-card # expect HTTP 402 Payment Required (about $0.001/call)
Listed in
Directories this entry was found in.