Mint tcbUSD from fiat
Debits a fiat account and mints the same amount of tcbUSD into the TCB wallet assigned to you, booked to the sub-account you name. tcbUSD earns nothing on its own; put it into the vault with POST /share-subscriptions to earn the vault rate. An idempotency key is MANDATORY: send it as the Idempotency-Key header or as the idempotencyKey body field. Replaying a key returns the original result without re-executing; reusing one with different parameters is rejected with IDEMPOTENCY_KEY_REUSED.
Debits a fiat account and mints the same amount of tcbUSD into the TCB wallet assigned to you, booked to the sub-account you name. tcbUSD earns nothing on its own; put it into the vault with POST /share-subscriptions to earn the vault rate. An idempotency key is MANDATORY: send it as the Idempotency-Key header or as the idempotencyKey body field. Replaying a key returns the original result without re-executing; reusing one with different parameters is rejected with IDEMPOTENCY_KEY_REUSED.
Authorization
bearer In: header
Header Parameters
Your own key for this request, 1-100 characters. Required, here or as the idempotencyKey body field; sending both is allowed only if they match. Replaying a key returns the first result without executing anything a second time, and sets replayed to true where the response carries that field. Sending the same key with different parameters is refused with 409 IDEMPOTENCY_KEY_REUSED — use a new key for a different request. While the first call is still running, a second call with the same key answers 409 IDEMPOTENT_REQUEST_IN_PROGRESS. The key is remembered permanently: it is recorded against the movement it created, so a replay years later still resolves to that one movement.
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
A request to mint tcbUSD from one of your fiat accounts.
Response Body
application/json
application/json
application/json
application/json
application/json
application/json
application/json
application/json
application/json
curl -X POST "https://example.com/api/partner/v1/token-mints" \ -H "Content-Type: application/json" \ -d '{ "amount": "1000.00", "currency": "USD", "idempotencyKey": "acme-step-2026-10-12-0001", "sourceAccountId": "1b9d4f07-6c23-4a8e-b510-9f2c7d3e5a68", "subAccountId": "5d3b8e10-2f47-4c9a-b6e8-0a71d4c2f395" }'{ "data": { "amount": "1000", "createdAt": "2026-09-02T10:15:30.000Z", "currency": "USD", "custody": { "mode": "TCB_SUBACCOUNT", "walletAddress": "0x3B9aC4f27D18E056b1C4a9F30d2E85c7A6b1F094" }, "disclosure": { "items": [ "ENVIRONMENT_IS_TESTNET: The environment is a testnet (Arbitrum Sepolia). No mainnet deployment exists.", "YIELD_IS_SIMULATED: The vault rate is set administratively and the interest it produces is minted as fresh underlying, not earned. It does not represent a return generated by deployed capital.", "FIAT_RAILS_ARE_MOCKED: No real fiat movement occurs. Balances are ledger entries against a sandbox provider.", "CONVERSION_RATES_ARE_MARKET_QUOTED_OR_REFUSED: A conversion is priced only by an external venue that quotes independently of TCB. When no such venue can price the pair, the conversion is refused rather than priced from an internal table. Read rate.pricingModel on every conversion: MARKET is a venue quote; any other value is not a market rate and must not be presented as one.", "CONTRACTS_ARE_UNAUDITED: No audit has been performed. Mainnet is gated on a two-firm audit that has not been commissioned.", "CUSTODY_IS_TCB_SUBACCOUNT: Everything held for the client — its vault shares, and the tcbUSD it holds between the steps of the tokenised deposit chain — is held in TCB custody, in the one TCB wallet assigned to the client. The client holds no keys and moves those tokens only through this API; each sub-account's shares and tcbUSD are book entries against what that wallet holds.", "INTEGRATION_AGREEMENT_ONLY: Fees as published on the rate card; no yield share, no return commitment." ], "summary": "This is a pilot integration on a testnet. Nothing in this system earns anything: the yield is simulated and the fiat rails are mocked.", "version": "2026-10-27" }, "fiatAccountId": "9f1c2a54-7b3d-4e08-9a61-2c5f0b7d4e13", "id": "7c1e5a90-2b4d-4f86-9e13-5a0d7b2c4e68", "idempotencyKey": "acme-step-2026-10-12-0001", "onchain": { "txHash": "0x4a1f9c07d3b28e615a0c47f8d29b3e6c15087af2d94b6c308e17b5d02fa4c396" }, "queue": { "claimableAt": "2026-09-02T10:15:30.000Z", "fills": [ { "bookedAt": "2026-09-02T10:15:30.000Z", "tokens": "400", "txHash": "0x8c41…" } ], "onchainRequestId": "42", "sharesEscrowed": "398.120000000000000000000000" }, "replayed": false, "settledAt": "2026-09-02T10:15:30.000Z", "shares": { "moved": "987.654321000000000000000000" }, "status": "SETTLED", "subAccountId": "9f1c2a54-7b3d-4e08-9a61-2c5f0b7d4e13", "token": { "address": "0x5c9E0a7d4F3b21C68e0A9b7D1f2E34c5A6b7C8d9", "chain": "ARBITRUM", "symbol": "tcbUSD" }, "tokens": { "moved": "1000" }, "type": "TOKEN_MINT", "vault": { "address": "0x7a2fD3c8e91B4A5d06E7c1F2b38A9d4C5e6f0B12", "chain": "ARBITRUM" } }, "success": true, "timestamp": "2026-09-02T10:15:30.000Z"}