Read your net-entreprises DSN returns through an API

What you can build on net-entreprises

• Get monthly DSN statuses

  Build this

  Reads Gestion des DSN mensuelles for one échéance: each SIRET déclaré with its status and the CRM counters for anomalies.

  Takes

  Échéance (05 or 15 of a month), status (optional), SIRET or SIREN (optional)

  Returns

  SIRET déclaré, raison sociale, ID flux, status, CRM types in anomaly, count

• List comptes rendus métiers in anomaly

  Build this

  Reads the list of CRM retour for one échéance and keeps those in KO or ANO, with the organisme that sent each one.

  Takes

  Échéance, CRM type (optional), SIRET (optional)

  Returns

  SIRET déclaré, ID flux, organisme, CRM type, status, date

• Get signalements d'événements

  Build this

  Reads Gestion des signalements d'événements for a period of up to 30 days: FCTU, arrêt de travail and reprise signalements with their status.

  Takes

  Start date, end date, signalement type, status

  Returns

  SIRET déclaré, signalement type, date, ID flux, status

• Deposit a DSN file

  Build this

  Uploads a DSN mensuelle or signalement file in the deposit box on the home page with Parcourir and Transmettre, and reads the result.

  Takes

  DSN file

  Returns

  File name, deposit date, result shown, ID flux

Automate net-entreprises with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Rejected or missing DSN after each échéance

  Build this

  Starts

  Every weekday at 8:00

  Step 1

  Get the monthly DSN statuses for the current échéance.

  Step 2

  Keep the SIRET with status Rejetée or Non transmise, and stop the run when there are none.

  Step 3

  Email you the list with SIRET déclaré, raison sociale and status.

• New CRM anomalies, sent to payroll

  Build this

  Starts

  Every weekday at 9:00

  Step 1

  List the comptes rendus métiers in anomaly for the current échéance.

  Step 2

  Keep the CRM that were not there on the last run.

  Step 3

  Post each one, with SIRET, organisme and CRM type, to your payroll system's webhook.

• Rejected FCTU and arrêt de travail signalements

  Build this

  Starts

  Every weekday at 17:00

  Step 1

  Get the signalements d'événements with status Rejeté for the last 2 days, one call per type.

  Step 2

  Keep the ones not there on the last run.

  Step 3

  Email you the list grouped by signalement type.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get monthly DSN statuses” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "net-entreprises.fr/get_monthly_dsn_statuses",
    "input": {
      "echeance": "2026-11-15",
      "status": "Rejetée"
    }
  }'

{
  "status": "completed",
  "data": {
    "echeance": "2026-11-15",
    "declarations": [
      {
        "siret_declare": "12345678900021",
        "raison_sociale": "Acme Logistique",
        "id_flux": "DSN-2026-11-0004821",
        "status": "Rejetée",
        "crm_in_anomaly": []
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

Net-entreprises’s own options

GIP-MDS publishes the API DSN for payroll software and concentrateurs: it deposits DSN and fetches the accusés d'enregistrement, certificats de conformité and bilans de traitement. Each software publisher builds it into its own payroll product. The site itself is free, and its dashboards export to CSV and download CRM as a ZIP.

Read on November 12, 2026: L'API DSN, Comptes rendus métiers DSN, Mode opératoire, nouvelle interface (October 2026).

Signing in to net-entreprises

net-entreprises signs you in with four fields: SIRET, Nom, Prénom and Mot de passe, or with a certificate instead. With Fous you sign in once through the password form with your own account: the login is sealed with AES-256, never returned by the API or written to logs, and an expired session is signed back in.

Worth knowing

Two months back, then by ID flux

The DSN mensuelle search goes back at most 2 months, by échéance of the 5 or the 15. Test DSN and DSN mensuelles older than 3 months are found by their ID flux alone.

The table stops at 60 declarations

Beyond 60 declarations the results table is partial. The export to CSV holds every declaration that matches the search, with extra fields such as the raison sociale of the SIRET déclaré.

Check CRM counters against the list

The October 2026 guide says the counter of CRM in anomaly is not always right and advises exporting the results and checking each line's status. Read the CRM list, not only the counter.

Habilitations decide what a déclarant sees

Each déclarant needs the Habilitation pour la DSN RG to reach the DSN area. DSN for the Régime Agricole opens the MSA portal instead.

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