Chorus Pro

Chorus Pro is the French public platform for electronic invoicing and payment processing between public administrations and their suppliers. It provides a portal where businesses can submit, track, and manage invoices, access payment status, and retrieve related documentation, supporting the French e‑invoicing ecosystem.

Chorus Pro is listed with 1 API on the APIs.io network. Tagged areas include Company, Payments, PublicSector, France, and E-invoicing.

The Chorus Pro catalog on APIs.io includes 1 Spectral governance ruleset.

Chorus Pro’s developer surface includes support, signup flow, API reference, documentation, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.7/100 emerging Agent 20/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company PaymentsPublicSectorFranceE-invoicing

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 18.7/100 · emerging

Contract Quality 2.2 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 4.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 4.6 / 9

Regulatory Posture 2.0 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 10.5 — up to +22.4 composite points
Developer Ergonomics scores 21.4 — up to +15.7 composite points
Access Clarity scores 23.7 — up to +15.3 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/chorus-pro/apis.yml: open an issue on github.com/api-evangelist/chorus-pro to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Chorus Pro API

Chorus Pro API as documented publicly: 3 operations. Contract generated from the documentation by API Evangelist (2026-10-27); not the provider's own document.

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Chorus Pro API Rules

9 rules · 7 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Chorus Pro Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Vocabulary

Vocabulary

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Vendors

Vendors

Hosts

Hosts

Source (apis.yml)

aid: chorus-pro
name: Chorus Pro
description: Chorus Pro is the French public platform for electronic invoicing and payment processing between public administrations
  and their suppliers. It provides a portal where businesses can submit, track, and manage invoices, access payment status,
  and retrieve related documentation, supporting the French e‑invoicing ecosystem.
url: https://raw.githubusercontent.com/api-evangelist/chorus-pro/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- Payments
- PublicSector
- France
- E-invoicing
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Vendors
  url: vendors/chorus-pro-vendors.yml
- type: Spectral
  url: rules/chorus-pro-rules.yml
- type: Vocabulary
  url: vocabulary/chorus-pro-vocabulary.yml
- type: Conformance
  url: conformance/chorus-pro-conformance.yml
- type: LLMsTxt
  url: llms/chorus-pro-llms.txt
- type: WellKnown
  url: well-known/chorus-pro-well-known.yml
- type: Hosts
  url: hosts/chorus-pro-hosts.yml
- type: TermsOfService
  url: https://www.data.gouv.fr/pages/legal/legal-notice
- type: Support
  url: https://www.data.gouv.fr/support
- type: SignUp
  url: https://www.data.gouv.fr/register?next=/dataservices
- type: APIReference
  url: https://www.data.gouv.fr/pages/spd/reference
- type: Documentation
  url: https://doc.transport.data.gouv.fr/
- type: DomainSecurity
  url: security/chorus-pro-domain-security.yml
- type: Website
  url: https://chorus-pro.gouv.fr/
apis:
- aid: chorus-pro:chorus-pro-api
  name: Chorus Pro API
  description: 'Chorus Pro API as documented publicly: 3 operations. Contract generated from the documentation by API Evangelist
    (2026-10-27); not the provider''s own document.'
  humanURL: https://www.data.gouv.fr/dataservices/api-sirene-open-data/discussions
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/chorus-pro-openapi-generated.yml
    x-provenance: generated
x-coverage:
  state: none
  reason: no-developer-program
  detail: No public developer program or API documentation was found for Chorus Pro.
  evidence:
  - url: https://portail.chorus-pro.gouv.fr/
    status: 302
  checked: '2026-10-27'
x-submission-probe: 301 https://portail.chorus-pro.gouv.fr/, 2026-10-26
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 15
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Chorus Pro API — frequently asked questions

Does Chorus Pro have an API?

Yes. APIs.io lists 1 API from Chorus Pro, including Chorus Pro API.

Is there an OpenAPI specification for the Chorus Pro API?

Yes. APIs.io indexes 1 OpenAPI specification for Chorus Pro, each linked for download from this page.

How do I authenticate with the Chorus Pro API?

Chorus Pro uses bearer-token authentication.

Is the Chorus Pro API ready for AI agents?

Chorus Pro has a Kin Score of 18.7 out of 100 (emerging) and an Agent Readiness score of 20.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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