---
title: "POST /api/v1/billing.service-credits.rate-cards.list"
method: POST
path: "/api/v1/billing.service-credits.rate-cards.list"
tags: ["Billing"]
---

# POST /api/v1/billing.service-credits.rate-cards.list

`POST /api/v1/billing.service-credits.rate-cards.list`

## Request

- Base URL: `https://api.partly.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.partly.com/api/v1/billing.service-credits.rate-cards.list`
- Auth: none declared. Required headers: `authorization`

List the service-credit rate-card versions, latest effective first. Restricted to billing staff.

## Headers

- `authorization` string, required: UTF-8 encoded string

## Response `200`

200 OK

- BillingServiceCreditRateCardListResponse
  - `versions` BillingServiceCreditRateCardVersionDetail[], required: Every version, latest `effective_at` first.
    - `actor` string, required: UTF-8 encoded string
    - `created_at` string, date-time, required: DateTime at a given timezone (RFC3339 format)
    - `effective_at` string, date-time, required: DateTime at a given timezone (RFC3339 format)
    - `id` string, uuid, required: UUID value type
    - `rates` BillingCoreServiceCreditsRateCardCandidateRate[], required: Expandable array type
      - `candidate_system_version` string, required: UTF-8 encoded string
      - `derived_meter` union, required
        - 'uncached_input_tokens'
        - 'cache_read_input_tokens'
        - 'cache_write_input_tokens'
        - 'visible_output_tokens'
        - 'reasoning_output_tokens'
      - `rate` BillingCoreServiceCreditsConversionConversionRate, required: Exact non-negative rational `credit_quanta / source_atomic_units`. A zero numerator marks an explicitly free meter. Both components are at most 2^53 - 1 (9007199254740991), so they are exact in JSON clients that decode numbers as doubles; the denominator is positive.
        - `credit_quanta` integer, required: 64-bit unsigned integer
        - `source_atomic_units` integer, required: 64-bit unsigned integer
      - `usage_basis` 'interpreter_model_tokens_v1', required: `input_tokens` includes cache reads and writes; `output_tokens` is visible output and excludes `reasoning_output_tokens`.
    - `reason` string, required: UTF-8 encoded string

## Other responses

- `default`: Error cases

## Changes

- **2026-10-19** `0060854f7c86`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/partly/apis/core-server/changes/api/v1/billing.service-credits.rate-cards.list/post.md)

---

[API](https://skmtc.dev/partly/apis/core-server.md) · [All operations](https://skmtc.dev/partly/apis/core-server/llms.txt) · [OpenAPI document](https://skmtc.dev/partly/apis/core-server/revisions/19dd5c84162b?raw)