Sirenic Marches API

openapi: 3.2.0
info:
  title: Sirenic Marches API
  version: 1.0.0
  description: 'French & European company data, pay-per-call in USDC or EURC — EURC at numeric parity: the same figure as the USDC price, not FX-converted (at the ECB rate of 4 Sept 2026, about 16 % more in dollar terms) via the x402 protocol — or with an API key and prepaid credits (1 credit = 1 EUR, same per-call prices, no wallet).'
  contact:
    email: contact@sirenic.eu
  license:
    name: 'Data: Licence Ouverte / Open License Etalab 2.0'
    url: https://www.etalab.gouv.fr/licence-ouverte-open-licence/
servers:
- url: https://api.sirenic.eu
security:
- {}
- ApiKeyAuth: []
- BearerAuth: []
tags:
- name: Marches
paths:
  /v1/marches/expirations:
    get:
      summary: 'Tender anticipation: French public contracts expiring within a window'
      x-price: $0.05
      x-payment:
        protocol: x402
        network: eip155:8453
      parameters:
      - name: cpv
        in: query
        required: false
        schema:
          type: string
          pattern: ^\d{2,8}$
        example: '45'
        description: CPV prefix (45 = construction works)
      - name: departement
        in: query
        required: false
        schema:
          type: string
          pattern: ^(?:0[1-9]|1\d|2[1-9]|[3-8]\d|9[0-5]|2[AB]|97[1-8]|98[4-8])$
        example: '69'
        description: French department code (01-95, 2A, 2B, 971-978, 984-988)
      - name: fenetre_mois
        in: query
        required: false
        schema:
          type: integer
          minimum: 1
          maximum: 24
        example: 12
        description: Window in months (default 12)
      - name: page
        in: query
        required: false
        schema:
          type: integer
          minimum: 1
          maximum: 500
        example: 1
        description: 50 contracts per page
      responses:
        '200':
          description: 'Contracts whose ESTIMATED end date (notification + initially declared duration; duration amendments are absent from the DECP source) falls inside the window, sorted by end date: buyer (SIRET + resolved name), incumbent holders, amount (after amendment when published), framework-agreement flag, CPV, department. Buyers typically re-tender 4-9 months before expiry. An empty list is scoped honestly: contracts under EUR 40k excl. VAT are unpublished.'
          content:
            application/json:
              example:
                filtres:
                  cpv: '45'
                  departement: null
                  fenetre_mois: 6
                total_marches: 34249
                page: 1
                pages: 685
                marches:
                - id: '2777529'
                  objet: Travaux de menuiserie pour l'accueil de la DRFIP 44
                  acheteur:
                    siret: '13001292500017'
                    nom: DIRECTION REGIONALE FINANCES PUBLIQUES PAYS DE LA LOIRE ET DEPARTEMENT LOIRE ATLANTIQUE
                  montant: 9788.8
                  accord_cadre: false
                  montant_est_enveloppe: true
                  modalites_execution: Marchés subséquents
                  sous_traitance_declaree: false
                  lot_numero: null
                  date_notification: '2025-09-02'
                  duree_mois: 12
                  date_fin_estimee: '2026-09-02'
                  code_cpv: 45421100-5
                  departement: null
                  titulaires_sortants:
                  - siren: '501383251'
                    nom: SOGEA ATLANTIQUE BTP
        '400':
          $ref: '#/components/responses/Reponse400InvalidInput'
        '402':
          $ref: '#/components/responses/Reponse402PaymentRequired'
        '404':
          description: No diffusible company for this SIREN.
        '503':
          description: 'Anticipation stock not loaded yet (code `collecte_en_cours`): the extended DECP re-ingestion has not completed. Nothing is charged; retrying immediately will not help.'
      tags:
      - Marches
      operationId: getV1MarchesExpirations
      x-operation-id-source: derived
components:
  responses:
    Reponse402PaymentRequired:
      description: Payment required — x402 payment requirements in body (JSON) and headers.
    Reponse400InvalidInput:
      description: 'Invalid input. Body: {error, champ, message}. Never charged. / Jamais facturé.'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-Api-Key
      description: 'Sirenic API key (srn_live_…) paying with prepaid credits (1 credit = 1 EUR, same prices as x402). Credits expire 12 months after purchase; calls are charged first to the credits closest to expiry. Optional: without it, the same routes answer 402 with a signable x402 quote. Insufficient balance → 402 {error: credits_insuffisants} WITHOUT a PAYMENT-REQUIRED header. Get a key at /compte.'
    BearerAuth:
      type: http
      scheme: bearer
      description: 'The same srn_live_… API key sent as Authorization: Bearer. A bearer value that is not an srn_ key is ignored (x402 flow unchanged).'