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Operate As

Integration

Affirm

Buy now, pay later: charges, captures, refunds and checkout. Your client pastes their Affirm key once, and your agent or your code works with their access.

Payments

About Affirm

Affirm is a buy now, pay later service for online checkouts.

With your client's Affirm connected, your agent or code can work with charges, captures and refunds.

Affirm

Affirm · Payments

API key

Buy now, pay later: charges, captures, refunds and checkout

The client pastes their API key from Affirm's settings. We store it encrypted.

Tested against Affirm's live API.

Building with Affirm? The docs have setup steps and code for every tool.

Open the Affirm docs

Tools

Your agent calls any endpoint of Affirm's API with the request tool, with the client's access attached.

Base URL for request

https://api.affirm.com/api/v1

  • request

    HTTPS ANY /v1/clients/{clientId}/affirm/{path}

    Any endpoint of Affirm's own API, with the client's access attached.

    servicestringrequired
    This service: affirm
    methodstringrequired
    GET, POST, PUT, PATCH or DELETE
    pathstringrequired
    The path under https://api.affirm.com/api/v1
    queryobjectoptional
    Query parameters
    bodyobjectoptional
    A JSON body

Over MCP every tool also takes client_id, from list_clients. Over HTTPS send it as clientId to https://api.operate.as/v1.

What the client approves

  • Use the Affirm key you paste, with only the access you gave that key

Related

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