API.gouv's API Impot particulier page and OpenAPI definition show a restricted DGFiP source for fiscal-reference data, tax-assessment situations, housing-tax data, and LEP eligibility checks.
The creative agent use case is a benefits intake assistant that checks whether a public-service workflow can replace a tax-document upload with an authorized API lookup, then stops and asks for a human eligibility decision before any request is made.
Copy-Paste Agent Instruction
Review API Impot particulier for my public-service workflow. Identify the exact endpoint family I would need, the legal eligibility condition, the minimal data fields, and the DataPass or authorization step. Do not draft code that calls the API until I confirm my organization is eligible.
Implication
For governance teams, the point is not speed alone. The catalog page says access is restricted, asks administrations to justify citizen simplification and proportionality, and routes banks toward a separate SFiP path for LEP eligibility.
Test Caveat
This is not a public unauthenticated API to try from a prompt. What to watch: whether API.gouv keeps pairing OpenAPI files with eligibility language clear enough for agents to recommend the right human approval path.