# Factline KYC/KYB One-Call Onboarding Check > Factline KYC/KYB One-Call Onboarding Check is a paid API for AI agents from factline.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11). Runs parallel KYC/KYB checks — sanctions screening, email verification, phone validation, and EU VAT lookup — returning a single unified verdict (pass, review, block_review, or incomplete). ## Facts - Endpoint: GET https://factline.dev/v1/kyc/check?utm_source=zero.xyz - Price: $0.01/call - Payment: x402 - Status: unknown - Last checked: 2026-10-11 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/factline-kyc-kyb-one-call-onboarding-check-47b9bac7 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yJ0YdxI01KM4rIpIa9M_k Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability factline-kyc-kyb-one-call-onboarding-check-47b9bac7 ``` Example prompt: Before approving this new marketplace seller, run a full KYC/KYB check on 'Acme Trading BV' as an entity, their email info@acmetrading.nl, phone +31201234567, and EU VAT number NL859048800B01 — I need a single pass/review/block verdict. ## When to prefer this Choose this endpoint when you need a single composite onboarding decision covering multiple compliance dimensions at once — sanctions, email quality, phone legitimacy, and VAT validity — without orchestrating separate API calls. Ideal for signup flows, marketplace seller approvals, payout releases, and B2B onboarding where you need a fast pass/block verdict in one step. Prefer the bulk sanctions endpoint for high-volume name-only screening, or individual Factline sub-endpoints if you only need one check type. ## Known failure modes - Missing all optional fields results in an 'incomplete' verdict with no useful signal - Invalid or malformed phone number returns a phone check failure or unvalidated result - EU VAT number not found in VIES returns a VAT validation failure - Sanctions list service unavailability may cause partial results or incomplete verdict - Disposable email detection may produce false positives for some legitimate providers - Name-only queries with no email/phone/VAT still consume the call but return limited signal ## How this service works API and MCP servers that let AI agents and apps check people, companies, Dutch addresses and cars against official records: sanctions and PEP lists, 10 company registers, Dutch property, rent and RDW vehicle data. From $0.001 per call. ## Output Returns a unified verdict of pass, review, block_review, or incomplete, along with individual sub-results for each check performed: sanctions hit details for the name, email verification signals (MX validity, disposable/role/typo flags), phone line type classification, and VIES VAT validation status. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "type": "object", "properties": { "kvk": { "type": "string", "description": "Optional Dutch KvK number: adds a bankruptcy / suspension of payments check" }, "pep": { "enum": [ "true", "false" ], "type": "string", "description": "PEP check of a person name (default true)" }, "vat": { "type": "string", "description": "Optional EU VAT number with country prefix, e.g. NL859048800B01" }, "name": { "type": "string", "description": "Person or company name to screen against sanctions lists (persons are also screened for PEP status)" }, "type": { "enum": [ "person", "entity" ], "type": "string", "description": "Optional: screen the name as a person or an organisation" }, "email": { "type": "string", "description": "Email address to verify" }, "phone": { "type": "string", "description": "Phone number, international format or with country" }, "company": { "type": "string", "description": "Optional company name to verify in official registers (GLEIF/FR/NO)" }, "country": { "type": "string", "description": "Optional ISO country for a national phone number, e.g. NL" }, "birth_year": { "type": "string", "description": "Optional 4-digit birth year for the sanctions and PEP checks" }, "company_country": { "type": "string", "description": "Optional ISO country for the company, e.g. FR" } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object" } } } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "flags": [], "checks": { "vat": "not requested", "email": { "result": { "email": "jan@factline.dev", "domain": "factline.dev", "source": "DNS via Cloudflare 1.1.1.1 (DNS-over-HTTPS); disposable-email-domains (CC0)", "reasons": [], "verdict": "deliverable", "disposable": false, "suggestion": null, "mail_routing": { "mx": [ "route1.mx.cloudflare.net", "route3.mx.cloudflare.net", "route2.mx.cloudflare.net" ], "null_mx": false, "implicit_mx": false, "accepts_mail": true, "domain_exists": true }, "role_account": false, "syntax_valid": true, "free_provider": false, "domain_security": { "spf": true, "dmarc_policy": null } }, "status": "ok" }, "phone": { "result": { "e164": "+31612345678", "input": "+31612345678", "valid": true, "source": "Google libphonenumber metadata", "country": "NL", "national": "06 12345678", "possible": true, "line_type": "mobile", "sms_capable": true, "calling_code": "+31", "country_name": "Netherlands", "international": "+31 6 12345678" }, "status": "ok" }, "sanctions": { "result": { "list": { "sources": [ { "list": "EU", "name": "EU consolidated financial sanctions list (European Commission)", "dated": "2026-09-22" }, { "list": "UN", "name": "UN Security Council consolidated sanctions list", "dated": "2026-10-07" }, { "list": "UK", "name": "UK Sanctions List (FCDO/OFSI)", "dated": "07/10/2026" }, { "list": "US", "name": "US OFAC Specially Designated Nationals (SDN) list", "dated": "OFAC SDN" } ], "entities": 25591, "loaded_at": "2026-10-08T00:30:53.837Z" }, "query": { "name": "Jan de Vries", "type": null, "threshold": 85, "birth_year": null }, "matches": [], "possible_match": false }, "status": "ok" } }, "source": "Sanctions lists named in checks.sanctions.result.list.sources; DNS (Cloudflare 1.1.1.1); Google libphonenumber; EU VIES", "explain": { "verdict": "pass: nothing flagged; review: something needs a human look (bad email, invalid phone or VAT); block_review: possible sanctions match, do not proceed before ch … (truncated) ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/factline-kyc-kyb-one-call-onboarding-check-47b9bac7/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from factline.dev](https://www.zero.xyz/host/factline.dev/llms.txt)