Connect Pinterest first
- 01
Open Accounts in 1Post and choose Connect.
- 02
Pick Pinterest.
- 03
Sign in with Pinterest and approve access for the account you want to post to.
- 04
Choose the account in 1Post. It is ready to pick in the composer.
Then GET /v1/accounts returns the id of the Pinterest account to use in the request.
Pinterest posts go into one of the account's boards; GET /v1/accounts/{id}/targets lists them.
Send a post to Pinterest
Pinterest refuses a post without media, so upload the file first and put its id in media_ids (POST /v1/media/uploads, or POST /v1/media to fetch a public address). Then schedule the post.
curl https://api.get1post.com/v1/posts \
-H "Authorization: Bearer $ONEPOST_API_KEY" \
-H "Idempotency-Key: pinterest-first-post" \
-d '{"accounts":["ACCOUNT_ID"],"parts":[{"text":"Five table settings for a spring brunch.","media_ids":["MEDIA_ID"]}],"schedule_at":"2026-11-02T15:00:00Z"}'The reply is 202 with the post (status scheduled) and one destination for Pinterest, which moves from queued to published or failed.
What you can send to Pinterest
- Image Pin
- Video Pin with a cover
- Carousel of 2 to 5 images
- Board, link and title
Pinterest rules the request is checked against
| Rule | What 1Post checks |
|---|---|
| Text limit | 500 characters, counted by code points |
| Title limit | 100 characters |
| Description limit | 500 characters |
| Media accepted | Images, Video |
| Images per post | 5 |
| Videos per post | 1 |
| Images and video together | Not in one post |
| Several images | All must have the same dimensions |
| Carousel | 2 to 5 items |
| Threads | No |
| First comment | No |
| Posts per day, per connected account (1Post) | 10 |
The same table with sources is on the Pinterest specs page.
Pinterest options in the request
- Media is required: Pinterest refuses a post without it. Upload the file first (POST /v1/media/uploads, or POST /v1/media to fetch a public address) and list its id in the media_ids of a part.
Check the post before it is queued
Add "dry_run": true to test a post: nothing is kept, a valid one answers 200 and a broken one answers 422 naming the rule.
{
"error": {
"code": "invalid_for_platform",
"message": "pinterest refuses this post: Pinterest counts 532 of 500 characters in part 1. (text_too_long).",
"fix": "Fix the rule named in the message and send the post again.",
"retryable": false,
"request_id": "REQUEST_ID"
}
}An assistant connected to the MCP server sends the same fields to create_post; set one up.