Find a contact by tax ID

Resolve one canonical contact by Spanish tax identifier within the authenticated company.

The result includes all cumulative roles, so integrations do not need separate client and supplier lookups.

Authorization

AuthorizationBearer <token>

Your API key as a bearer token: fact_live_… in production, fact_test_… in sandbox. See the authentication guide.

In: header

Path Parameters

company*string

Public identifier (UUID v7) of the company. Get it from GET /v1/me (data.scope[].id).

Formatuuid

Pin the API version (YYYY-MM-DD, Stripe-style date versioning) for this request; omit to use the key's pinned version, or the latest if none. Unsupported version → 400 unsupported_api_version; malformed → 400 parameter_invalid_format. The effective version is echoed in the Factuarea-Version response header. See the Versioning guide.

Formatdate

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

tax_id*string

Lengthlength <= 20

Response Body

`application/json`

Request example

const apiKey = process.env.FACTUAREA_API_KEY;if (!apiKey) throw new Error("Set FACTUAREA_API_KEY");const response = await fetch("https://api.factuarea.com/v1/companies/01931b3e-7c4a-7f2e-9a8b-3c5d6e7f8a01/contacts/find-by-tax-id", {  method: "POST",  headers: { Authorization: `Bearer ${apiKey}`, ...{"Accept":"application/json","Content-Type":"application/json"} },  body: JSON.stringify({  "tax_id": "01931b3e-7c4a-7f2e-9a8b-3c5d6e7f8a01"}),});if (!response.ok) throw new Error(await response.text());if (response.status !== 204) console.log(await response.json());

Response example

{
  "data": {
    "id": "0198f4d1-a492-7e05-9a35-000000000001",
    "object": "contact",
    "kind": "company",
    "name": "Distribuciones Ejemplo SL",
    "business_name": "Distribuciones Ejemplo SL",
    "commercial_name": "Ejemplo",
    "tax_id": "B12345674",
    "vat_id": null,
    "alternative_id": null,
    "address": {
      "line1": "Calle Mayor",
      "line2": null,
      "number": "10",
      "floor": null,
      "door": null,
      "staircase": null,
      "city": "Madrid",
      "province": "Madrid",
      "postal_code": "28013",
      "country": "ES"
    },
    "contact_person": "Ana García",
    "email": "administracion@example.com",
    "phone": "+34910000000",
    "mobile": null,
    "fax": null,
    "website": "https://example.com",
    "billing_emails": [
      "facturas@example.com"
    ],
    "tags": [
      "distribuidor"
    ],
    "coordinates": null,
    "notes": null,
    "metadata": {
      "erp_id": "CONTACT-42"
    },
    "accumulate_347": true,
    "external_id": "CONTACT-42",
    "roles": [
      {
        "role": "customer",
        "status": "active",
        "assigned_at": "2026-08-29T10:00:00+00:00",
        "deactivated_at": null
      },
      {
        "role": "supplier",
        "status": "active",
        "assigned_at": "2026-08-29T10:00:00+00:00",
        "deactivated_at": null
      }
    ],
    "bank_accounts": [],
    "customer_profile": {
      "default_price_list_uuid": null,
      "default_discount": null,
      "default_vat_rate": null,
      "default_retention_rate": null,
      "is_surcharge_subject": false,
      "preferred_operation_regime": null,
      "payment_method": null,
      "payment_terms_days": null,
      "dir3_accounting_office": null,
      "dir3_managing_body": null,
      "dir3_processing_unit": null,
      "dir3_proponent": null
    },
    "supplier_profile": {
      "default_taxes_uuid": null,
      "default_discount": null,
      "default_vat_rate": null,
      "default_retention_rate": null,
      "is_surcharge_subject": false,
      "preferred_operation_regime": null,
      "payment_method": null,
      "payment_terms_days": null
    },
    "financial_summary": {
      "sales": {
        "invoiced_amount": "1210.00",
        "collected_amount": "800.00",
        "receivable_amount": "410.00",
        "currency": "EUR"
      },
      "purchases": {
        "purchased_amount": "605.00",
        "paid_amount": "400.00",
        "payable_amount": "205.00",
        "currency": "EUR"
      }
    },
    "latest_activity": null,
    "is_archived": false,
    "archived_at": null,
    "created_at": "2026-08-29T10:00:00+00:00",
    "updated_at": "2026-08-29T10:00:00+00:00"
  }
}

Unknown query parameter

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_unknown",
    "message": "El parámetro 'per_page' no está reconocido por este endpoint.",
    "param": "per_page",
    "doc_url": "https://docs.factuarea.com/guides/errors#parameter_unknown",
    "request_id": "req_01HKQS5N7UR6PWJ8K2T5BWPMZ9"
  }
}

Parameter has invalid format

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_invalid_format",
    "message": "El parámetro 'created' debe seguir el formato ISO-8601 (YYYY-MM-DDTHH:mm:ssZ).",
    "param": "created",
    "doc_url": "https://docs.factuarea.com/guides/errors#parameter_invalid_format",
    "request_id": "req_01HKQS5N7UR6PWJ8K2T5BWPMZA"
  }
}

Parameter value is out of range

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_invalid_range",
    "message": "El parámetro 'limit' debe estar entre 1 y 100, recibido: 500.",
    "param": "limit",
    "doc_url": "https://docs.factuarea.com/guides/errors#parameter_invalid_range",
    "request_id": "req_01HKQS5N7UR6PWJ8K2T5BWPMZB"
  }
}

Retired X-Active-Profile header sent

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_unknown",
    "subcode": "retired_active_profile_header",
    "message": "La cabecera 'X-Active-Profile' fue retirada de la API v1: la empresa efectiva se indica en el segmento de empresa de la ruta.",
    "param": "X-Active-Profile",
    "doc_url": "https://docs.factuarea.com/guides/errors#parameter_unknown",
    "request_id": "req_01J8Y3M2Q40000000000000001"
  }
}

Malformed Factuarea-Version header

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_invalid_format",
    "message": "El header 'Factuarea-Version' debe tener formato YYYY-MM-DD.",
    "param": "Factuarea-Version",
    "doc_url": "https://docs.factuarea.com/guides/errors#parameter_invalid_format",
    "request_id": "req_01J8Y3M2Q40000000000000002"
  }
}

Unsupported Factuarea-Version

{
  "error": {
    "type": "invalid_request_error",
    "code": "unsupported_api_version",
    "message": "La versión de API '2020-01-01' no está soportada.",
    "param": "Factuarea-Version",
    "doc_url": "https://docs.factuarea.com/guides/errors#unsupported_api_version",
    "request_id": "req_01J8Y3M2Q40000000000000003"
  }
}

Missing API key

{
  "error": {
    "type": "authentication_error",
    "code": "missing_api_key",
    "message": "No se ha proporcionado una API key válida en el header Authorization.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#missing_api_key",
    "request_id": "req_01HKQS5N8VR7QXJ9K3T6BWPMZA"
  }
}

Invalid API key format

{
  "error": {
    "type": "authentication_error",
    "code": "invalid_api_key",
    "message": "La API key no tiene el formato esperado (debe empezar por fact_live_ o fact_test_).",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#invalid_api_key",
    "request_id": "req_01HKQS5N9JTQM7HVTQP3FBN5XB"
  }
}

Revoked API key

{
  "error": {
    "type": "authentication_error",
    "code": "api_key_revoked",
    "message": "Esta API key ha sido revocada y ya no es válida.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#api_key_revoked",
    "request_id": "req_01HKQS5NA8K7E2V9YDZWMT6RJC"
  }
}

Expired API key

{
  "error": {
    "type": "authentication_error",
    "code": "api_key_expired",
    "message": "Esta API key ha caducado.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#api_key_expired",
    "request_id": "req_01HKQS5NAPIKEYEXPIRED00008"
  }
}

Request IP outside the API key allowlist

{
  "error": {
    "type": "authentication_error",
    "code": "ip_not_allowed",
    "message": "La IP 203.0.113.10 no está autorizada para esta API key.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#ip_not_allowed",
    "request_id": "req_01HKQS5NIPNOTALLOWED000009"
  }
}

API key lacks required scope

{
  "error": {
    "type": "authorization_error",
    "code": "insufficient_scope",
    "message": "Esta API key no tiene el scope requerido para esta operación.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#insufficient_scope",
    "request_id": "req_01HKQS5NBC3P8M1KX4V7SLNHQD"
  }
}

Plan upgrade required

{
  "error": {
    "type": "authorization_error",
    "code": "feature_not_available_in_plan",
    "message": "Esta funcionalidad requiere el plan empresario o superior. Actualiza tu suscripción para acceder.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#feature_not_available_in_plan",
    "request_id": "req_01HKQS5NCK4V9N2L7Y8X3WPMRE"
  }
}

Plan without public API access

{
  "error": {
    "type": "authorization_error",
    "code": "addon_not_active",
    "message": "Tu plan actual no incluye acceso a la API pública. Contrata o renueva un plan de Factuarea para usar la API.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#addon_not_active",
    "request_id": "req_01HKQS5NDP5W0Q3M8Z9A4BVSNF"
  }
}

Module not available with a test key

{
  "error": {
    "type": "authorization_error",
    "code": "module_not_available_in_sandbox",
    "message": "El módulo \"verifactu\" no está disponible en modo de pruebas. Usa una clave fact_live_ para operar sobre este recurso.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#module_not_available_in_sandbox",
    "request_id": "req_01HKQS5NMODULESANDBOX00010"
  }
}

Account provider privilege not granted

{
  "error": {
    "type": "authorization_error",
    "code": "privileged_scope_required",
    "message": "Esta operación exige el privilegio de proveedor de cuentas (accounts:*) y la persona que emitió la clave debe ser propietaria o administradora de la cuenta",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#privileged_scope_required",
    "request_id": "req_01HKQS5NPRIVILEGEDSCOPE001"
  }
}

Operation of the owning account on a tax ID reached through a relation

{
  "error": {
    "type": "authorization_error",
    "code": "forbidden_action",
    "message": "Esta operación solo la puede hacer la cuenta dueña del NIF: con un acceso por relación entre cuentas no está disponible.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#forbidden_action",
    "request_id": "req_01HKQS5NRELATIONNIFOWNER01"
  }
}

Company deactivated

{
  "error": {
    "type": "authorization_error",
    "code": "company_inactive",
    "message": "Esta empresa está desactivada. Actívala para operar.",
    "param": "company",
    "doc_url": "https://docs.factuarea.com/guides/errors#company_inactive",
    "request_id": "req_01J8Y3M2Q40000000000000005"
  }
}

POST /v1/companies/{company}/contacts/find-by-tax-id · 404 contact_not_found

{
  "error": {
    "type": "not_found_error",
    "code": "contact_not_found",
    "message": "Contacto no encontrado.",
    "param": "tax_id",
    "doc_url": "https://docs.factuarea.com/guides/errors#contact_not_found",
    "request_id": "req_01K5CONTACTNOTFOUND000000000"
  }
}

Company not found or outside the API key scope

{
  "error": {
    "type": "not_found_error",
    "code": "profile_not_found",
    "message": "La empresa indicada no existe o no está en el ámbito de tu credencial.",
    "param": "company",
    "doc_url": "https://docs.factuarea.com/guides/errors#profile_not_found",
    "request_id": "req_01J8Y3M2Q40000000000000004"
  }
}

Parameter failed validation

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_invalid",
    "message": "El campo `name` es obligatorio y no puede estar vacío.",
    "param": "name",
    "doc_url": "https://docs.factuarea.com/guides/errors#parameter_invalid",
    "request_id": "req_01HKQS5NGS8Z3T6Q1D2E7FYVSI"
  }
}

Invalid Idempotency-Key format

{
  "error": {
    "type": "invalid_request_error",
    "code": "invalid_param_format",
    "message": "La Idempotency-Key debe tener entre 1 y 255 caracteres ASCII printable.",
    "param": "Idempotency-Key",
    "doc_url": "https://docs.factuarea.com/guides/errors#invalid_param_format",
    "request_id": "req_01HKQS5NIDEMPKEYFORMAT0007"
  }
}

Idempotency key reused with different body

{
  "error": {
    "type": "idempotency_error",
    "code": "idempotency_key_reused",
    "message": "La Idempotency-Key 'order-2026-0001' ya se usó con un payload distinto.",
    "param": "Idempotency-Key",
    "doc_url": "https://docs.factuarea.com/guides/errors#idempotency_key_reused",
    "request_id": "req_01HKQS5NHT9A4U7R2E3F8GZWTJ"
  }
}

Rate limit exceeded

{
  "error": {
    "type": "rate_limit_error",
    "code": "rate_limit_exceeded",
    "message": "Has excedido el rate limit de 60 peticiones por minuto. Reintenta tras 30 segundos.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#rate_limit_exceeded",
    "request_id": "req_01HKQS5NKW1C6W9T4G5H0JBZVL"
  }
}

Too many authentication failures (temporary lockout)

{
  "error": {
    "type": "authentication_error",
    "code": "too_many_auth_failures",
    "message": "Has alcanzado el número máximo de intentos de autenticación fallidos. La API key queda bloqueada temporalmente. Reintenta tras el tiempo indicado en `Retry-After`.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#too_many_auth_failures",
    "request_id": "req_01HKQS5NKW1C6W9T4G5H0JBZVM"
  }
}

Too many concurrent uploads in flight

{
  "error": {
    "type": "rate_limit_error",
    "code": "upload_in_flight_budget_exceeded",
    "message": "Tu empresa tiene demasiadas subidas en curso a la vez: este archivo ocupa 10 MB y el margen simultáneo es de 120 MB. Espera a que terminen las subidas en marcha y vuelve a intentarlo dentro de 45 segundos.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#upload_in_flight_budget_exceeded",
    "request_id": "req_01HKQS5NUPLOADINFLIGHT005"
  }
}

Company-wide rate limit exceeded (all keys combined)

{
  "error": {
    "type": "rate_limit_error",
    "code": "company_rate_limit_exceeded",
    "message": "Tu empresa ha superado su límite conjunto de 900 peticiones por minuto, contando a la vez todas sus credenciales. Es un techo de la empresa, así que repartir el tráfico no lo eleva. Reintenta en 12 segundos, o solicita una ampliación de plan si necesitas más capacidad.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#company_rate_limit_exceeded",
    "request_id": "req_01HKQS5NCOMPANYRATELIMIT06"
  }
}

Company-wide monthly quota exhausted (all keys combined)

{
  "error": {
    "type": "rate_limit_error",
    "code": "company_monthly_quota_exceeded",
    "message": "Tu empresa ha agotado su cuota conjunta de 150000 peticiones de este mes, contando a la vez todas sus credenciales. Es un techo de la empresa, así que repartir el tráfico no lo eleva. El contador se reinicia el día 1 del mes siguiente; solicita una ampliación de plan si necesitas más volumen antes.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#company_monthly_quota_exceeded",
    "request_id": "req_01HKQS5NCOMPANYMONTHLY0007"
  }
}

Monthly quota of the API key exhausted

{
  "error": {
    "type": "rate_limit_error",
    "code": "monthly_quota_exceeded",
    "message": "Has agotado tu cuota mensual de 100000 requests. Mejora tu plan para obtener una cuota superior.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#monthly_quota_exceeded",
    "request_id": "req_01HKQS5NMONTHLYQUOTA000011"
  }
}

Portfolio rate limit exceeded (all tax IDs of the account combined)

{
  "error": {
    "type": "rate_limit_error",
    "code": "portfolio_rate_limit_exceeded",
    "message": "La cartera de tu cuenta ha superado su límite conjunto de 1800 peticiones por minuto, contando a la vez todos sus NIF. Es un techo de la cartera, así que repartir el tráfico entre NIF no lo eleva. Reintenta en 12 segundos, o solicita una ampliación de plan si necesitas más capacidad.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#portfolio_rate_limit_exceeded",
    "request_id": "req_01HKQS5NPORTFOLIORATE00012"
  }
}

Portfolio monthly quota exhausted (all tax IDs of the account combined)

{
  "error": {
    "type": "rate_limit_error",
    "code": "portfolio_monthly_quota_exceeded",
    "message": "La cartera de tu cuenta ha agotado su cuota conjunta de 300000 peticiones de este mes, contando a la vez todos sus NIF. Es un techo de la cartera, así que repartir el tráfico entre NIF no lo eleva. El contador se reinicia el día 1 del mes siguiente; solicita una ampliación de plan si necesitas más volumen antes.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#portfolio_monthly_quota_exceeded",
    "request_id": "req_01HKQS5NPORTFOLIOMONTH0013"
  }
}

{
  "error": {
    "type": "api_error",
    "code": "internal_error",
    "message": "Ha ocurrido un error inesperado. Si persiste, contacta con soporte adjuntando el request_id.",
    "param": null,
    "doc_url": "https://docs.factuarea.com/guides/errors#internal_error",
    "request_id": "req_01HKQS5NLX2D7X0U5H6J1KCAWM"
  }
}

Find a contact by tax ID

Authorization

Path Parameters

Headers

Request Body

Response Body

200application/json

400application/json

401application/json

403application/json

404application/json

422application/json

429application/json

500application/json

`application/json`

`application/json`

`application/json`

`application/json`

`application/json`

`application/json`

`application/json`

`application/json`