---
title: "Validate a promo code"
method: POST
path: "/billing/validate-promo"
tags: ["Billing"]
---

# Validate a promo code

`POST /billing/validate-promo`

## Request

- Base URL: `https://api.mnemom.ai/v1`
- URL: `https://api.mnemom.ai/v1/billing/validate-promo`
- Auth: one of:
  - HTTP bearer
  - API key in header `X-Mnemom-Api-Key`

## Request body

- object
  - `code` string, required

## Response `200`

Promo validation result

- object
  - `valid` boolean
  - `discount_percent` number, nullable
  - `discount_amount_cents` integer, nullable
  - `name` string, nullable

## Other responses

- `400`: Bad request
- `401`: Authentication required
- `403`: Forbidden
- `429`: Rate-limit exceeded. The global per-IP limiter (100 requests/minute, applied to every `/v1/*` route) rejected this request. Back off until the window resets — `Retry-After` carries the cooldown in seconds and `X-RateLimit-Reset` the absolute reset time.
- `500`: Server error — request was well-formed but the server failed to fulfill it. Typically a downstream dependency (DB / RPC / external API) returned an unexpected error.

---

[API](https://skmtc.dev/mnemom/apis/mnemom-api.md) · [All operations](https://skmtc.dev/mnemom/apis/mnemom-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mnemom/apis/mnemom-api/revisions/274b7a6ea182?raw)