---
title: "Suppress prospects by email"
method: POST
path: "/prospects/suppress"
tags: ["Suppressions"]
---

# Suppress prospects by email

`POST /prospects/suppress`

## Request

- Base URL: `https://warmysender.com/api/v1`
- URL: `https://warmysender.com/api/v1/prospects/suppress`
- Auth: HTTP bearer

Adds emails to your suppression list so those people are never contacted by any campaign. Existing prospects are marked suppressed.

Required scope: `suppressions:write`.

Requires a unique `Idempotency-Key` request header so retries never duplicate.

## Headers

- `Idempotency-Key` string, required

## Request body

- object
  - `emails` string[], required: Emails to suppress (1–1000).
  - `reason` string: Optional reason stored with each entry.

## Response `200`

Success

## Other responses

- `400`: `validation_error` — Body failed validation.
- `401`: `unauthorized` — Missing or invalid API key.
- `403`: `insufficient_scope` — The API key lacks the scope this endpoint requires.
- `429`: `rate_limited` — Too many requests — slow down and retry after the Retry-After delay.

---

[API](https://skmtc.dev/warmysender/apis/warmysender-public-api.md) · [All operations](https://skmtc.dev/warmysender/apis/warmysender-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/warmysender/apis/warmysender-public-api/revisions/289e9c167a1a?raw)