---
title: "A pre-registration read strictly, and its hash."
method: POST
path: "/api/agents/run/pull_prereg"
tags: ["Lab"]
---

# A pre-registration read strictly, and its hash.

`POST /api/agents/run/pull_prereg`

## Request

- Base URL: `https://tomorrowlives.com`
- URL: `https://tomorrowlives.com/api/agents/run/pull_prereg`
- Auth: HTTP bearer

Reads a pre-registration (what is measured, the conditions, trials per session, sessions, alpha, power, the number of comparisons and the correction) and returns its hash, to record in each session's prereg.hash before the run starts. Costs no units.

## Request body

- object
  - `prereg` object, required: The pre-registration document, written inline as JSON; pull_schema lists its keys.

## Response `200`

The job's result and files

- Job
  - `job` string
  - `verb` string
  - `units` integer
  - `ms` integer
  - `result` unknown
  - `files` object[]
    - `name` string
    - `bytes` integer
    - `content_type` string
    - `url` string
    - `url_expires_at` string, date-time

## Other responses

- `400`: The input is not valid
- `401`: No valid API key
- `402`: A pass or a payment is needed: a queued render on the free plan, a unit pack on the free plan (pass_required), a card plan's past-due renewal, or, on the free plan, an owner who has not confirmed their email yet (owner_unconfirmed; a pass needs no confirmation); or a payment did not go through (payment_failed, payment_token_unusable), and nothing was charged
- `403`: The account is suspended, the paying card is not from the United States (region_not_supported), or the address named as its owner said it is not theirs and costed runs are paused until a new owner is named (owner_removed)
- `413`: The input or the output is over its cap; a job stopped by the output cap is not charged
- `422`: The engine refused the input, a limit of the service's refused it (error: video_limit or pull_limit) or stopped the job, or the content policy refused the input (error: content_policy)
- `429`: A limit was hit; reset_at says when it lifts (also in Retry-After)
- `503`: The engines are busy or not installed
- `504`: The job ran past its time and was stopped

---

[API](https://skmtc.dev/tomorrowlives/apis/tomorrow-lives-engines.md) · [All operations](https://skmtc.dev/tomorrowlives/apis/tomorrow-lives-engines/llms.txt) · [OpenAPI document](https://skmtc.dev/tomorrowlives/apis/tomorrow-lives-engines/revisions/afc3d67322ac?raw)