# Enter a commitment

`POST https://evohub.io/api/v1/billing/commitment`

Part of the [Billing API](https://docs.evohub.io/billing.md) reference · operationId `acceptCommitment`.

Agrees to the published commitment terms: a volume of `ehu` per
month for the term the terms set, starting on the first day of next
month, billed at the commitment price whether or not it is used.
This is a binding agreement; read `terms.body` from
`GET /api/v1/billing/commitment` first.

- `accepted` must be `true`, and `terms_version` must be the
  version of the terms you read; if the terms have changed since,
  the request is refused with **409** `TERMS_CHANGED`.
- `ehu` must be above zero.
- With a commitment already running, only a larger `ehu` is
  accepted (**409** `NOT_AN_INCREASE` otherwise). The running one
  then ends without any early-termination charge and the new one
  starts next month. To commit to less, end the current commitment
  first.

The acceptance records the terms version, who accepted (the person
behind a personal key, or the organization key) and the address the
request came from. Answers with the new commitment state.

Requires the `billing:commitment:write` scope.

## Authorization

Any one of:

- `bearerKey`
- `headerKey`

Where:

- `bearerKey`: HTTP Bearer — An EvoHub API key (`evohub_…`) as a bearer token.
- `headerKey`: API key in the header `X-API-Key` — An EvoHub API key (`evohub_…`).

## Request body (required)

Content type: `application/json`

Type: `object`

- `ehu` (number, required): EHU committed per month.
- `terms_version` (integer, required): The `terms.version` you read and agree to.
- `accepted` (boolean, required): Must be `true`.

## Responses

### 200 — The commitment was recorded.

Content type: `application/json`

Type: `object`

- `data` (CommitmentState)
  - `terms` (CommitmentTerms)
    - `version` (integer)
    - `body` (string): The full text of the agreement.
    - `body_sha256` (string)
    - `term_months` (integer)
    - `published_at` (string (date-time))
  - `active` (Commitment)
    - `id` (integer)
    - `org_id` (string)
    - `ehu_per_month` (number)
    - `starts_on` (string (date-time)): The first day of the first committed month.
    - `ends_on` (string (date-time)): The first day after the term (exclusive).
    - `status` (string, one of `active`, `completed`, `terminated`)
    - `terms_version` (integer)
    - `terms_sha256` (string): The hash of the agreement text that was accepted.
    - `accepted_at` (string (date-time))
    - `accepted_by` (string): The person, or the organization key, that accepted.
    - `accepted_ip` (string)
    - `terminated_at` (string (date-time))
    - `terminated_from` (string (date-time)): The first month no longer committed, for an ended commitment.
    - `terminated_by` (string)
    - `clawback_usd` (number): The early-termination charge.
    - `clawback_invoice_id` (string)
    - `clawback_invoice_url` (string (uri))
    - `clawback_invoice_pdf_url` (string (uri))
    - `clawback_invoiced_at` (string (date-time))
    - `ending_notice_at` (string (date-time)): When the organization was told the term is nearly over.
    - `created_at` (string (date-time))
  - `starts_on` (string (date-time)): When a commitment agreed now would start.
  - `estimated_clawback_usd` (number): What ending the active commitment today would cost; 0 without one.
  - `commitment_usd_per_ehu` (number)
  - `on_demand_usd_per_ehu` (number)
  - `history` (array of Commitment): The last 24 commitments.
    - `id` (integer)
    - `org_id` (string)
    - `ehu_per_month` (number)
    - `starts_on` (string (date-time)): The first day of the first committed month.
    - `ends_on` (string (date-time)): The first day after the term (exclusive).
    - `status` (string, one of `active`, `completed`, `terminated`)
    - `terms_version` (integer)
    - `terms_sha256` (string): The hash of the agreement text that was accepted.
    - `accepted_at` (string (date-time))
    - `accepted_by` (string): The person, or the organization key, that accepted.
    - `accepted_ip` (string)
    - `terminated_at` (string (date-time))
    - `terminated_from` (string (date-time)): The first month no longer committed, for an ended commitment.
    - `terminated_by` (string)
    - `clawback_usd` (number): The early-termination charge.
    - `clawback_invoice_id` (string)
    - `clawback_invoice_url` (string (uri))
    - `clawback_invoice_pdf_url` (string (uri))
    - `clawback_invoiced_at` (string (date-time))
    - `ending_notice_at` (string (date-time)): When the organization was told the term is nearly over.
    - `created_at` (string (date-time))

### 400 — The body is not JSON (`INVALID_BODY`), `accepted` is not `true` (`TERMS_NOT_ACCEPTED`), or `ehu` is not above zero (`INVALID_AMOUNT`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `STATEMENT_NOT_FOUND`)
  - `message` (string, required, example `No statement for that period.`)
  - `request_id` (string)

### 401 — No API key was sent, or it is unknown, revoked or expired (`UNAUTHORIZED`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `STATEMENT_NOT_FOUND`)
  - `message` (string, required, example `No statement for that period.`)
  - `request_id` (string)

### 403 — The key lacks the scope this endpoint needs (`FORBIDDEN`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `STATEMENT_NOT_FOUND`)
  - `message` (string, required, example `No statement for that period.`)
  - `request_id` (string)

### 409 — Commitments are not being offered (`TERMS_UNAVAILABLE`), the terms changed since the version you sent (`TERMS_CHANGED`), the new volume is not larger than the running one (`NOT_AN_INCREASE`), or a commitment is already running (`COMMITMENT_EXISTS`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `STATEMENT_NOT_FOUND`)
  - `message` (string, required, example `No statement for that period.`)
  - `request_id` (string)

### 429 — Too many requests (`RATE_LIMITED`). Wait for `Retry-After` seconds.

Headers:

- `Retry-After` (integer): Seconds to wait before retrying.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `STATEMENT_NOT_FOUND`)
  - `message` (string, required, example `No statement for that period.`)
  - `request_id` (string)

### 500 — The commitment could not be recorded (`COMMITMENT_FAILED`). Retry later.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `STATEMENT_NOT_FOUND`)
  - `message` (string, required, example `No statement for that period.`)
  - `request_id` (string)

## Example request

```bash
curl -X POST 'https://evohub.io/api/v1/billing/commitment' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer <TOKEN>' \
  -d '{
  "ehu": 5000,
  "accepted": true,
  "terms_version": 1
}'
```