---
title: "Add up to 100 addresses to Do Not Contact"
method: POST
path: "/suppressions"
tags: ["Suppression"]
---

# Add up to 100 addresses to Do Not Contact

`POST /suppressions`

## Request

- Base URL: `https://mcp.senders.ai/api/v1`
- URL: `https://mcp.senders.ai/api/v1/suppressions`
- Auth: HTTP bearer

Scope: suppression:write

## Headers

- `Idempotency-Key` string, required

## Request body

- SuppressionsBody
  - `emails` string[], required
  - `reason` 'manual' | 'unsubscribe'

## Response `200`

OK

- SuppressionsResult
  - `data` object
    - `added` integer
    - `already_suppressed` integer
    - `invalid` string[]
    - `not_processed` string[]: Not reached within the time budget; send again

## Other responses

- `400`: Invalid body or missing Idempotency-Key (bad_request, idempotency_key_required)
- `401`: Missing, wrong or revoked token
- `403`: Missing write permission, inactive account, or feature not enabled
- `409`: busy, conflict, idempotency_in_progress (retry) or a final conflict such as campaign_closed
- `413`: Body over 1 MB
- `415`: Body not JSON
- `422`: Idempotency-Key reused for a different request
- `429`: Rate or daily limit
- `503`: Writes paused because rate limiting is unavailable; retry after Retry-After

---

[API](https://skmtc.dev/senders/apis/senders-rest-api.md) · [All operations](https://skmtc.dev/senders/apis/senders-rest-api/llms.txt) · [OpenAPI document](https://skmtc.dev/senders/apis/senders-rest-api/revisions/3cd9960bc0af?raw)