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Onboard as a provider

Fiat on-ramp providers who seek to integrate their service into the MetaMask Fiat On-Ramp must use the following process.

Process overview

  1. Review the integration requirements and discuss with the On-Ramp team the compatibility of the provider solution.

  2. Decide if the provider will meet the On-Ramp technical specifications or if the On-Ramp team must develop a dedicated connector. This decision will have a strong impact on the release schedule of the integration.

  3. Implement the On-Ramp technical specifications, or provide documentation on a custom implementation and let the MetaMask On-Ramp team create the connector.

  4. Submit provider information to the On-Ramp team.

  5. Give the On-Ramp team access to two web servers:

    • A staging environment with test data and authentication and payment methods.
    • A production environment.

The On-Ramp team then:

  1. Reviews and validates the information.
  2. Extensively tests the web servers and its integration into the On-Ramp.

Once all tests are validated, the provider integration is enabled in the MetaMask On-Ramp server. If the MetaMask On-Ramp technical specifications are used, the On-Ramp team can enable the provider solution with a simple switch in the server without requiring any software updates.

Integration methods

On-ramp providers have two ways to integrate with the MetaMask Fiat On-Ramp:

  • Standard integration - The provider implements the MetaMask On-Ramp technical specifications using OpenAPI (for example, using Swagger). See the OpenAPI specification. This is the quickest way to integrate.

  • Custom integration - The On-Ramp team can create a connector to the provider implementation which doesn't conform to the MetaMask On-Ramp technical specifications. This requires more work from the On-Ramp team and takes more time. The required time depends on the existing features of the target provider solution.


    A custom integration may require more maintenance effort from MetaMask and might impact user experience.

Provider information

All providers must submit the following information to the MetaMask On-Ramp team:

  • The provider name (as displayed to users)

  • Dark and light logos (size and resolution to be communicated later)

  • A short description of the provider (500 characters maximum, written in English)

  • The business address of the provider

  • A list of labeled links (for example, "Homepage": "https://…", "Terms of service": "https://…")


    Provider information is submitted to ConsenSys but can't be updated without ConsenSys validation.

Integration testing

Once an integration has been implemented, it can be tested using a web-based demo app. An activation key is given to each provider to enable their specific features. Only people with this key can see the provider features not released to production.