{"data":{"slug":"factstamp","name":"FactStamp","description":"FactStamp verifies a company against official public registers in 15 jurisdictions and returns a dated, cited, machine-readable answer. Paid per call over x402 (USDC on Base); free catalogue at /series.json.","base_url":"https://agents.factstamp.dev","website_url":"https://factstamp.dev","category":"Verification","endpoint_count":10,"min_price_usd":0.02,"uptime_24h":100,"source":"submitted","status":"online","verified":false,"verified_until":null,"payment_ready":true,"payment_ready_until":"2026-10-21T12:43:03.172Z","last_success_at":"2026-10-14T12:43:03.172Z","consecutive_failures":0,"check_interval_minutes":15,"last_checked_at":"2026-10-14T12:43:03.172Z","created_at":"2026-10-14T10:02:31.152Z","uptime":{"24h":100,"7d":100,"30d":100,"90d":100,"coverage":{"24h":{"daysCovered":1,"checkCount":8},"7d":{"daysCovered":1,"checkCount":8},"30d":{"daysCovered":1,"checkCount":8},"90d":{"daysCovered":1,"checkCount":8}}},"avg_response_time_ms":218,"total_checks":11,"networks":["BSE"],"networks_caip2":["eip155:8453"],"asset":"USDC","endpoints":[{"id":"4eaf8155-0a10-4e4c-8d57-4346e47cab80","method":"POST","path":"/bulk","description":"Check a whole bibliography or dependency manifest in one round trip, before you rely on the list: up to 12 items at a flat US$0.12 — 1 cent an item, against 2 cents for the same lookups one at a time. Every item is answered by the same door that answers a single call, so the verdicts cannot disagree. A list, not prose: a whole document belongs to /document. Pay per call here, or redeem a prepaid pack code (one answer-pack credit per three items, up to 25 items on that rail).","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.060Z","variable_amount":false,"min_price_usd":0.12,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"120000","price_usd":"0.1200000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"e370a48a-138f-42e8-8140-1b85f0b1d885","method":"POST","path":"/check","description":"Check a dated figure you are about to act on against the publisher's own series, and receive verified, stale, contradicted or unknown with the as-of date. Call it before committing a number to a page, deck, model or decision. Coverage today is Australian primary sources; anything outside coverage returns unknown rather than a guess.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.076Z","variable_amount":false,"min_price_usd":0.05,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"50000","price_usd":"0.0500000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"868a588b-846f-46ee-8bff-d94b2dd9d86c","method":"POST","path":"/citation","description":"Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, ambiguous, retracted, not_found, unknown.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.147Z","variable_amount":false,"min_price_usd":0.02,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"20000","price_usd":"0.0200000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"6d464bfb-d86d-49ea-94c4-4fe398a03a66","method":"POST","path":"/document","description":"Call it before you send, file or publish a document that quotes figures, names companies or cites papers. Post the text and every checkable claim comes back verified against dated primary sources, as one signed bundle with a per-claim receipt and its licence. Claims we cannot answer are named and never charged, and the preview is free. Verdicts: verified, stale, contradicted, unknown. Prose, not a list: a bare bibliography belongs to /bulk.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.138Z","variable_amount":false,"min_price_usd":0.25,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"250000","price_usd":"0.2500000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"5f1c3c79-574a-484f-8a55-21ac78cf1d9d","method":"POST","path":"/entity","description":"Verify whether a legal entity exists and is currently registered, from open primary registers: the GLEIF LEI index, US SEC EDGAR and the Australian Business Register (ABN, ACN, GST, status). Call it before naming a company in a contract, invoice or filing, or when you need an identifier (ABN, ACN, LEI, CIK) for a company you know only by name. Returns found, ambiguous, not_found or unknown, cited to the register with its retrieval time. A near name match is never reported as a match.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.158Z","variable_amount":false,"min_price_usd":0.1,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"100000","price_usd":"0.1000000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"3800fed8-060c-4b78-ae16-98a09be70bb0","method":"POST","path":"/entity-file","description":"When you need the whole picture of one company before you sign, onboard, pay or acquire, call the entity file: ONE answer holding identity and standing, the registered office, SIC activity and previous names, the filing position, a sanctions screen across four lists, and the ownership chain to the ultimate parent — with ONE coverage block naming every register consulted and every one not. One call and one receipt instead of four. Unknown is a first-class answer.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.105Z","variable_amount":false,"min_price_usd":0.438119,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"438119","price_usd":"0.4381190000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"e27f2e0c-aa2b-47ac-9de2-10088992f603","method":"POST","path":"/package","description":"Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.096Z","variable_amount":false,"min_price_usd":0.02,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"20000","price_usd":"0.0200000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"0335b415-5e1d-4b71-9c9c-4bbf921b79ec","method":"POST","path":"/sanctions","description":"Screen a name against sanctions lists before you transact with it: is this person or company on OFAC SDN, the UN consolidated list, the EU Financial Sanctions File or the UK Sanctions List? Returns listed, mismatch, not_found or unknown, with the matched entry's own reference (program, country, aliases) and each list's dates. A near name is never reported as the same party, and a list that was not consulted is named as not consulted. Not advice, not a legal determination.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.051Z","variable_amount":false,"min_price_usd":0.05,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"50000","price_usd":"0.0500000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"8711f51d-d855-47f3-849b-bc4f549b1111","method":"POST","path":"/vat","description":"Check an EU VAT number before you rely on it: is this number a live VAT registration, and who is behind it? Asks the official VIES service (European Commission), keyless. Returns valid, invalid or unknown — an outage is never reported as invalid — with the member state, the register's own request date, and the trader identity only where that member state discloses it. GB is out of scope after Brexit; XI (Northern Ireland) is covered. Not tax advice.","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.085Z","variable_amount":false,"min_price_usd":0.05,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"50000","price_usd":"0.0500000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]},{"id":"a2ac1e97-6a00-4589-9ddc-9f6516a4696e","method":"POST","path":"/watch","description":"Buy a standing re-check of ONE citation or package version, when an answer must stay true for a month rather than once: daily re-checks for 30 days. US$0.50 the month — 1.7 cents a check, under a 2-cent lookup. The first check is answered and signed on purchase, and each real change (a retraction, a new advisory, a yanked version) gets its own signed receipt. One subject only: for a list use /watch/portfolio. Pay per call here, or redeem a pack code (10 credits).","mime_type":"application/json","is_active":true,"first_seen_at":"2026-10-14T10:02:31.152Z","last_seen_at":"2026-10-14T12:43:03.068Z","variable_amount":false,"min_price_usd":0.5,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"500000","price_usd":"0.5000000000","pay_to":"0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32","max_timeout_seconds":300}]}],"assessment":{"updated_at":"2026-10-14T10:03:04.542Z","input_hash":"6f4deae73a40a922b10fcf846bd4af5766702755ea1938a91b3807815df92ddf","model_id":null,"prompt_version":null,"reliability":{"uptime":{"24h":null,"7d":null,"30d":null,"90d":null},"response_p95_ms":null,"avg_response_ms":null,"last_checked_at":null,"consecutive_failures":0,"total_checks":0},"compliance":{"grade":"unknown","passed":0,"total":0,"checks":[{"id":"payload_captured","label":"402 payload captured","pass":null},{"id":"accepts_present","label":"accepts[] array present","pass":null},{"id":"payto_recoverable","label":"payTo address recoverable","pass":null},{"id":"payto_conformant","label":"payTo at accepts[0].payTo (conformant shape)","pass":null},{"id":"payto_shape","label":"payTo is a valid on-chain address","pass":null},{"id":"price_present","label":"atomic price declared","pass":null},{"id":"price_sane","label":"atomic price in a sane range","pass":null},{"id":"asset_declared","label":"asset (token) address declared","pass":null},{"id":"network_caip2","label":"network resolves to CAIP-2","pass":null},{"id":"scheme_declared","label":"payment scheme declared","pass":null},{"id":"transport_https","label":"served over HTTPS","pass":null},{"id":"x402_version_current","label":"declares the current x402 version (2)","pass":null},{"id":"eip712_domain_extra","label":"EIP-712 domain parameters present on every EVM entry","pass":null},{"id":"version_channel_coherent","label":"x402 v2 envelope delivered in the payment-required header","pass":null}],"pay_to_source":null,"pay_to_location":null,"staleness":{"probe_failing":false,"last_success_at":"2026-10-14T12:43:03.172Z","envelope_captured_at":"2026-10-14T10:03:02.685Z"}},"site":{"homepage":true,"openapi":true,"pricing":null,"llms_txt":true,"robots":true,"terms":true,"checked_at":"2026-10-14T10:03:02.438Z"},"domain":{"age_days":4,"registrar":"CloudFlare, Inc.","free_host":false,"created_date":"2026-10-10T07:51:26.776Z","checked_at":"2026-10-14T10:03:04.184Z"},"economics":{"price_usd":0.02,"price_atomic":"20000","model":"tiered","category_percentile":64,"stability":1,"price_max_usd":0.5,"category_percentile_max":75,"endpoint_count":10,"distinct_price_count":7},"risk":{"level":"clean","flags":[]},"synthesis":null,"traction":{"status":"measured","volume_usd_30d":0,"tx_count_30d":0,"unique_buyers_30d":0,"last_settlement_at":null,"top_buyer_share_30d":null,"top_3_buyers_share_30d":null,"concentrated_volume":false,"trend_7d_vs_30d":null,"shared_payout":false,"shared_with":0,"measured_networks":["eip155:8453"],"first_settlement_at":null,"volume_usd_all_time":0,"tx_count_all_time":0,"median_settlement_usd_30d":null,"max_settlement_usd_30d":null,"settled_via":[],"settled_via_detail":[],"shared_with_services":[],"pro_quota_share":1,"caveat":"Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.","all_time_caveat":"All-time is floored at the start of our harvest window, not the service full history."}}},"provenance":{"license":"CC-BY-4.0","attribution_required":true,"attribution":"Data: x402-list.com (CC BY 4.0)","cite_as":"https://x402-list.com/services/factstamp","source":"https://x402-list.com"}}