Electronic signatures in API mode

Construct your own signature pathway

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Electronic signatures in API mode Contact an advisor

The widest range of functionalities to construct your own signature pathway

Docaposte's electronic signature APIs support you in creating your own digital signature pathways for your needs from your information system (SI) , business software or website.

What's included in API packages

  • Account opening on a test and production platform

  • Access to an API portal, documentation and developer kits

  • Account and invoice data configured and managed by our teams

  • Implementation: 30-daytransaction duration, IP filtering if requested

  • Contact our team to obtain a quote

Contact our team to obtain a quote

Ask for an API access

Benefit from the most comprehensive API offer on the market with Docaposte.

The diversity of our APIs enables the integration of a large number of features:

  • Electronic signature: document notarization, simple, advanced and qualified signatures
  • PDF file viewer: creation, completion or signing of documents
  • Signatory identity verification services
  • Capture and verification of attached supporting documents
  • Offline mode (SDK mobile) : available on iOS, Android or Windows
  • etc.

If you are in a SalesForce or Dynamics environment, Docaposte proposes native APIs for these two environments. Our APIs are fully documented (French/ English/ Spanish) and you have an online testing portal.

How to integrate our APIs?

To integrate our electronic signature APIs, the process is simple:

  • Request access
  • Access is created by our team, which you receive at the e-mail address provided to us
  • Connect with the URL we send you with your login and password
  • Access to the whole range of resources and testing portal
  • Now you are ready to test and integrate!

Contact an advisor

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API Signing Frequently Asked Questions

  • With an electronic signature you:

    • Guarantee the integrity of an electronic document
    • Identify the author, by analogy with the handwritten signature on a paper document
    • Assure non-repudiation, the signee cannot deny having signed the document


    An electronic signature responds to the following demands:

    • Is unique to the signee
    • Is created in a way in which the signee can maintain exclusive control
    • Guarantee a link to the act to which it is attached

  • By signing up to the API offer, you have complete access to the API catalogue of electronic signatures, where you will find documentation about all exposed webservices as well as a test area so that you can experiment with different webservice calls and test your pathways fully before integrating the webservices into your IS, business application or website.

  • Support is included in the API offer to guide you with the integration. Nevertheless, complementary services are also available in case you want further support. Contact our team for more information.

  • With Docaposte's APIs, you can electronically sign the following document formats:


    • PAdES : PDF Advanced Electronic Signature 
    1. the norm ETSI TS 102 778 (parts 1 to 5) 
    2. allows you to sign documents in PDF format
    3. and is highly adapted to dematerialization of invoices, orders, etc.
    4. The Reader (usually Abode Reader) includes signature verification (the famous signature panel, accessible on the blue line at the top of a signed PDF)


    • XAdES: XML Advanced Electronic Signature
    1. All XML-DSig (ETSI TS 101 903) norm extensions which make it compatible with advanced electronic signatures
    2. Allows you to sign documents in XML format
    3. The interest of this format is that you can sign parts of the document, without breaking the signature of another part signed by another signee
    4. Widely used by the French administration
    5. It is also used by Microsoft Office (from 2010)


    • CAdES: CMS Advanced Electronic Signature
    1. A range of extensions to the Cryptographic Message Syntax (CMS) signature standard making it compatible with advanced electronic signatures (ETSI TS 101 733)
    2. Allows signing of CMS or S/MIME (e-mails) binary files
    3. Especially adapted to binary content as it does not require transformation (for example: videos, images, programs, etc.)
    4. Presents the benefit of natively managing cosignatures of the same level

  • With our identity verification services, our APIs offer the possibility to produce advanced signatures in your signature pathways. These services can be activated at the start of the project.