---
title: "Opt-in a processor token to Signal"
method: POST
path: "/processor/signal/prepare"
tags: ["plaid"]
---

# Opt-in a processor token to Signal

`POST /processor/signal/prepare`

When a processor token is not initialized with `signal`, call `/processor/signal/prepare` to opt-in that processor token to the data collection process, which will improve the accuracy of the Signal Transaction Score.

If this endpoint is called with a processor token that is already initialized with `signal`, it will return a 200 response and will not modify the processor token.

## Request body

- ProcessorSignalPrepareRequest — ProcessorSignalPrepareRequest defines the request schema for `/processor/signal/prepare`
  - `client_id` string — Your Plaid API `client_id`. The `client_id` is required and may be provided either in the `PLAID-CLIENT-ID` header or as part of a request body.
  - `secret` string — Your Plaid API `secret`. The `secret` is required and may be provided either in the `PLAID-SECRET` header or as part of a request body.
  - `processor_token` string, required — The processor token obtained from the Plaid integration partner. Processor tokens are in the format: `processor-<environment>-<identifier>`

## Response `200`

OK

- ProcessorSignalPrepareResponse — ProcessorSignalPrepareResponse defines the response schema for `/processor/signal/prepare`
  - `request_id` string, required — A unique identifier for the request, which can be used for troubleshooting. This identifier, like all Plaid identifiers, is case sensitive.

## Other responses

- `default` — Error response.

---

[API](https://skmtc.net/plaid/apis/the-plaid-api.md) · [All operations](https://skmtc.net/plaid/apis/the-plaid-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/plaid/the-plaid-api/versions/64c4514ea59b/schema)