---
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 Signal data collection process, which will improve the accuracy of the Signal 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.

## Changes

- **2025-03-26** `09cbc8444913` — 2 warning
  - added the new `CHECK_REPORT_ERROR` enum value to the `error_type` response property for the response status `default`
  - added the new `CONSUMER_REPORT_ERROR` enum value to the `error_type` response property for the response status `default`
- **2024-09-04** `a2c34406c317` — 5 warning, 1 info
  - added the new `PARTNER_ERROR` enum value to the `error_type` response property for the response status `default`
  - added the new `SANDBOX_ERROR` enum value to the `error_type` response property for the response status `default`
  - added the new `TRANSACTIONS_ERROR` enum value to the `error_type` response property for the response status `default`
  - added the new `TRANSACTION_ERROR` enum value to the `error_type` response property for the response status `default`
  - …2 more
- **2024-02-21** `5de70cc1e6ca` — 3 warning, 11 info
  - removed the optional property `error_code_reason` from the response with the `default` status
  - removed the optional property `provided_account_subtypes` from the response with the `default` status
  - removed the optional property `required_account_subtypes` from the response with the `default` status
  - removed the `BASE_REPORT_ERROR` enum value from the `error_type` response property for the response status `default`
  - …10 more

[Change history](https://skmtc.dev/plaid/apis/the-plaid-api/changes/processor/signal/prepare/post.md)

---

[API](https://skmtc.dev/plaid/apis/the-plaid-api.md) · [All operations](https://skmtc.dev/plaid/apis/the-plaid-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/plaid/the-plaid-api/revisions/5eae3158bbfc/schema)