# `programme_write_limit`

**Status 429.** The daily limit for programme changes through the API has been reached.

## What it means

This account has made 100 programme changes through the API in the last 24 hours, across all its keys, which is the most it may. The limit stops a runaway script or assistant rewriting a programme again and again. `limit` and `used` show where the account stands. Nothing was changed.

## What to do

Make the change in the Matrix Rewards app in your Shopify admin, which has no such limit, or wait until earlier changes are more than 24 hours old and send it with a new `Idempotency-Key`.

## Safe to send again?

No. The same request will get the same answer.

## What else the answer carries

- `limit`: How many programme changes the account may make through the API in the window.
- `used`: How many it has made in the window.

## Where you can meet it

- [`POST /stores/{store_key}/programme`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#updateProgramme): Change the earn rate, the bonuses, what a point is worth, referrals, spending any amount, the time zone, the ways to earn, or when points expire
- [`POST /stores/{store_key}/programme/rewards`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#addReward): Add a reward shoppers can spend points on
- [`POST /stores/{store_key}/programme/rewards/{reward_id}`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#changeReward): Change a reward's cost, value, minimum order or label
- [`POST /stores/{store_key}/programme/rewards/{reward_id}/remove`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#removeReward): Remove a reward
- [`POST /stores/{store_key}/programme/offers`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#addOffer): Add an offer: a campaign, a product offer or a channel offer
- [`POST /stores/{store_key}/programme/offers/{offer_id}`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#changeOffer): Change an offer
- [`POST /stores/{store_key}/programme/offers/{offer_id}/remove`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#removeOffer): Remove an offer
- [`POST /stores/{store_key}/design`](https://matrixrewards.co.uk/docs/api/2026-10/stores.md#updateDesign): Change the design: colours, words, the panel and product-line look, the account page layout, the terms link

Every code, and the shape of an error answer: [Errors](https://matrixrewards.co.uk/docs/errors.md).

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Page: https://matrixrewards.co.uk/docs/errors/programme_write_limit
Contract: 2026-10 sha256:35af153960028890fea5738799f5a71e535e1eea4dd3f6b8d5f50b37f02363da