> ## Documentation Index
> Fetch the complete documentation index at: https://docs.trylath.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Every Lath operation is POST https://platform.trylath.com/<operation name with dots replaced by slashes>, with a JSON body and `Authorization: Bearer <key>`. `email.send` is POST /email/send.
> Branch on `error.code`, never on `error.message`. Every refusal also carries `error.fix`, which names the next step.
> Send an `Idempotency-Key` header on any operation that is not retry-safe, so a retry cannot run it twice.
> A `lath_test_` key emails only the account's own members and sends no SMS; a `lath_live_` key reaches real recipients and is billed.
> The OpenAPI document, generated from the same registry as the routes, is at https://platform.trylath.com/openapi.json.

# billing.credit.record

> Records a credit, refund or adjustment against this account. Append-only: nothing here is edited or deleted, and a mistake is corrected by recording its reverse. The amount is always positive; the kind says which direction it goes.



## OpenAPI

````yaml /api-reference/openapi.json post /billing/credit/record
openapi: 3.1.0
info:
  title: Lath API
  version: 0.1.0
  description: >-
    Every operation is one POST. The same set is reachable over MCP, the SDK and
    the CLI; nothing is dashboard-only.
servers:
  - url: https://platform.trylath.com
    description: This deployment
security: []
paths:
  /billing/credit/record:
    post:
      tags:
        - billing
      summary: billing.credit.record
      description: >-
        Records a credit, refund or adjustment against this account.
        Append-only: nothing here is edited or deleted, and a mistake is
        corrected by recording its reverse. The amount is always positive; the
        kind says which direction it goes.
      operationId: billing.credit.record
      parameters:
        - name: Idempotency-Key
          in: header
          required: false
          schema:
            type: string
          description: >-
            Replays the stored response for the same key and input; refuses
            different input.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $schema: https://json-schema.org/draft/2020-12/schema
              type: object
              properties:
                amountCents:
                  type: integer
                  exclusiveMinimum: 0
                  maximum: 100000000
                kind:
                  type: string
                  enum:
                    - credit
                    - refund
                    - adjustment
                  description: >-
                    credit: off a future invoice. refund: money already taken,
                    returned. adjustment: a correction to what was counted.
                reason:
                  type: string
                  minLength: 3
                  maxLength: 500
                period:
                  description: >-
                    The month it belongs to. Omitted means the next invoice,
                    which is what most goodwill credits mean.
                  type: string
                  pattern: ^\d{4}-\d{2}$
              required:
                - amountCents
                - kind
                - reason
              additionalProperties: false
      responses:
        '200':
          description: '{ activityId, result }. activityId is empty for reads.'
          content:
            application/json:
              schema:
                type: object
                properties:
                  activityId:
                    type: string
                    description: The activity this call created, or empty for a read.
                  result:
                    $schema: https://json-schema.org/draft/2020-12/schema
                    type: object
                    properties:
                      credit:
                        type: object
                        properties:
                          id:
                            type: string
                            format: uuid
                            pattern: >-
                              ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                          amountCents:
                            type: integer
                            minimum: -9007199254740991
                            maximum: 9007199254740991
                          kind:
                            type: string
                            enum:
                              - credit
                              - refund
                              - adjustment
                          reason:
                            type: string
                          period:
                            type:
                              - string
                              - 'null'
                          reversesId:
                            anyOf:
                              - type: string
                                format: uuid
                                pattern: >-
                                  ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                              - type: 'null'
                          createdAt:
                            type: string
                            format: date-time
                            pattern: >-
                              ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$
                        required:
                          - id
                          - amountCents
                          - kind
                          - reason
                          - period
                          - reversesId
                          - createdAt
                        additionalProperties: {}
                    required:
                      - credit
                    additionalProperties: {}
                required:
                  - activityId
                  - result
        '400':
          description: invalid_input or invalid_json
        '401':
          description: unauthenticated
        '403':
          description: forbidden
        '404':
          description: not_found
        '409':
          description: 'conflict: idempotency_mismatch, email_taken, last_key'
        '413':
          description: body_too_large
        '429':
          description: rate_limited
      security:
        - bearer: []
components:
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
      description: >-
        A Lath API key: lath_live_sk… or lath_test_sk… on a server,
        lath_live_pk… or lath_test_pk… in a browser.

````