---
title: "Register an existing provider-created stablecoin"
method: POST
path: "/stablecoins"
tags: ["Stablecoins"]
---

# Register an existing provider-created stablecoin

`POST /stablecoins`

## Request

- Base URL: `https://api.lightspark.com/grid/2025-10-13`
- URL: `https://api.lightspark.com/grid/2025-10-13/stablecoins`
- Auth: HTTP basic

Register an existing provider-created stablecoin as a Grid `Stablecoin`. This endpoint links provider token metadata to Grid; it does not create the token with the provider. Grid derives the active provider account link from the authenticated platform, provider, and provider environment.

## Headers

- `Idempotency-Key` string, required

## Request body

- StablecoinRegisterRequest
  - `providerTokenIdentifier` string, required: Provider identifier for the stablecoin. For Brale this maps to `value_type`.
  - `networkTokenIdentifier` string, required: Token identifier in the namespace selected by `network`.
  - `network` 'SPARK', required: Public network family for the stablecoin token identifier. The concrete Spark network is inferred from the platform mode.
  - `stablecoinProviderAccountId` string: Provider account link to register against. Optional when exactly one active link exists for the authenticated platform; required to resolve STABLECOIN_PROVIDER_ACCOUNT_SELECTION_REQUIRED when multiple links exist.

## Response `201`

Stablecoin registered

- Stablecoin
  - `id` string, required: System-generated stablecoin identifier.
  - `name` string, required: Stablecoin display name.
  - `symbol` string, required: Stablecoin symbol.
  - `baseCurrency` string, required: Fiat currency the stablecoin is denominated against.
  - `network` 'SPARK', required: Public network family for the stablecoin token identifier. The concrete Spark network is inferred from the platform mode.
  - `decimals` integer, required: Number of decimal places used by the stablecoin.
  - `issuanceStatus` 'PENDING_REVIEW' | 'PROVISIONING' | 'PROVISIONED' | 'REJECTED' | 'FAILED', required: Provider issuance/linking status for the registered stablecoin.
  - `gridOperationsStatus` 'NOT_ENABLED' | 'PENDING_APPROVAL' | 'ENABLING' | 'ENABLED' | 'DISABLED', required: Whether the stablecoin has been enabled for normal Grid operations.
  - `networkTokenIdentifier` string, required: Token identifier in the namespace selected by `network`.
  - `currency` string: Grid currency code after the stablecoin is enabled for Grid operations.
  - `provider` 'BRALE', required: Stablecoin provider backing the linked account, stablecoin, or operation.
  - `stablecoinProviderAccountId` string, required: Stablecoin provider account link selected for this stablecoin.
  - `providerEnvironment` 'SANDBOX' | 'PRODUCTION', required: Provider environment derived from the authenticated Grid platform mode.
  - `providerTokenIdentifier` string, required: Provider token identifier. For Brale this maps to `value_type`.
  - `createdAt` string, date-time, required: Creation timestamp.
  - `updatedAt` string, date-time, required: Last update timestamp.

## Other responses

- `400`: Bad request
- `401`: Unauthorized
- `404`: Referenced stablecoin provider account not found
- `409`: Conflict
- `500`: Internal service error

## Changes

> 115 revisions in range; 2 not diffed.

- **2026-10-28** `d996ddfb9d2b`: 2 info
  - added the optional property `details/missingFields` to the response with the `400` status
  - added the optional property `details/refusalReason` to the response with the `400` status
- **2026-10-26** `f11f1e76bdd7`: 1 warning
  - added the new `PURCHASE_CARD_LIMIT_REACHED` enum value to the `code` response property for the response status `409`
- **2026-10-26** `0a6dad5815c7`: 1 warning
  - added the new `INVOICE_ALREADY_USED` enum value to the `code` response property for the response status `409`
- **2026-10-24** `715332dcb111`: 1 warning
  - added the new `EXACT_AMOUNT_UNAVAILABLE` enum value to the `code` response property for the response status `400`
- **2026-10-20** `761d1d030cb5`: 2 warning
  - added the new `AGENT_CARD_EXISTS` enum value to the `code` response property for the response status `409`
  - added the new `CARDHOLDER_AGREEMENT_NOT_ACCEPTED` enum value to the `code` response property for the response status `400`

[Operation history](https://skmtc.dev/lightsparkdev/apis/grid-api/changes/stablecoins/post.md)

---

[API](https://skmtc.dev/lightsparkdev/apis/grid-api.md) - [All operations](https://skmtc.dev/lightsparkdev/apis/grid-api/llms.txt) - [OpenAPI document](https://skmtc.dev/lightsparkdev/apis/grid-api/revisions/7a1db46ec552?raw)