---
title: "Create a Blacklist entry"
method: POST
path: "/blacklist"
tags: ["Customer Blacklist"]
---

# Create a Blacklist entry

`POST /blacklist`

Create a new Customer Blacklist entry with the provided details

## Request body

- CreateCustomerBlacklistDTO
  - `email` string, email, required — The blacklisted email. Stored lowercased.
  - `reason` string

## Response `201`

OK

- CustomerBlacklistDTO
  - `createdAt` string, date-time, required — The date and time when the entity was created.
  - `updatedAt` string, date-time, nullable, required — The date and time when the entity was last updated.
  - `metadata` object, nullable — Metadata used by merchants to store additional information about the entity.
  - `id` string, required — The unique identifier of the customer blacklist entry
  - `email` string, required — Email address of the blacklisted customer
  - `reason` string, nullable, required — Reason for blacklisting this customer

## Other responses

- `202` — The merchant is entitled but its environment is not provisioned yet. Provisioning has been kicked off (exactly once) and is in progress; retry the request — it succeeds once the environment is ready. Returned only for identity-token (dashboard) requests bound to a merchant, not for secret-key API calls; any such endpoint can return it while provisioning is underway.
- `400` — The request was rejected. `type` is `invalid_request_error` when the request itself is at fault — `errors` then lists every problem found, with field-attributable entries prefixed by the field’s path; `invalid_state_error` when the request was well-formed but the resource is not in a state that allows it; or `payment_error` when the payment was refused by the issuer or processor.
- `401` — No API key was supplied, or the key is not valid. `type` is `authentication_error`.
- `403` — The API key is valid but lacks the permission this operation requires. `type` is `permission_error`.
- `409` — `type` is `conflict_error`. The supplied `X-Idempotency-Key` was already used with a different request body (`code` is `idempotency_conflict`, and retrying will not help), or the resource is being modified by another in-flight request (`code` is `resource_locked`, and retrying with backoff will).
- `429` — Too many requests. The rate limit is applied per client across all operations. `type` is `rate_limit_error`.
- `500` — The request could not be completed because of an unexpected error. `type` is `api_error`.
- `503` — A dependency needed to authorize the request is temporarily unavailable — the auth service that verifies credentials, or the entitlement lookup behind it. `type` is `api_error`. It is raised before the operation runs, so the request had no effect, and unlike a plain 500 the condition is transient: retry with backoff.
- `504` — The request exceeded the processing time limit and was abandoned. `type` is `api_error` and `code` is `timeout` — unlike a plain 500 the request may still have taken effect, so retry with the same idempotency key rather than blindly.

## Changes

- **2026-09-02** `de9880e65aea` — 1 info
  - added the non-success response with the status `503`

[Change history](https://skmtc.dev/odus/apis/odus-orchestration-api/changes/blacklist/post.md)

---

[API](https://skmtc.dev/odus/apis/odus-orchestration-api.md) · [All operations](https://skmtc.dev/odus/apis/odus-orchestration-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/odus/odus-orchestration-api/revisions/de9880e65aea/schema)