> ## Documentation Index > Fetch the complete documentation index at: https://docs.mag3nt.com/llms.txt > Use this file to discover all available pages before exploring further. # Launch a Credential Token for an owned credential > Mints a fixed-supply B20 Asset representing a claim on the credential's future revenue. Charges the MAG3NT launch fee from the owner's own wallet (never the credential's holder). One CRT per credential; a second launch returns the existing one. Deploys on-chain synchronously when possible, else leaves it PENDING_DEPLOY for the deploy cron to retry. ## OpenAPI ````yaml /openapi.yaml post /api/cards/{id}/launch-crt openapi: 3.1.0 info: title: mag3nt API version: '2026-07-16' description: > Payment infrastructure for AI agents. Issue virtual cards backed by credentials, pay for API access via x402/AP2/MPP protocols, and settle in USDC on Base. Also covers Native Token Rails membership and recurring billing agreements, ERC-20 project token registration (including B20) and prepaid MAG3NT fee metering for DIRECT (non-custodial) settlement, the credential marketplace and Credential Token (CT) markets, account-wide token holdings, and signed webhooks for payment and subscription lifecycle events. contact: name: mag3nt url: https://mag3nt.com license: name: Proprietary url: https://github.com/mag3nt-com/mag3nt-node/blob/main/LICENSE servers: - url: https://mag3nt.com description: Production - url: https://staging.mag3nt.com description: Staging, Base mainnet security: - ApiKeyAuth: [] tags: - name: Payments description: Universal outbound protocol payments - name: Cards description: Virtual payment card lifecycle - name: Keys description: Developer API key management - name: Funding description: Treasury deposits and balances - name: x402 description: HTTP 402 payment protocol - name: AP2 description: Agent-to-Agent Payment Protocol - name: MPP description: Micropayment Protocol with streaming - name: Pay Links description: Shareable payment URLs - name: Withdrawals description: Withdraw unspent funds back to wallet - name: Settlement description: On-chain settlement status - name: Webhooks description: Signed payment and subscription lifecycle notifications for sellers - name: Status description: System health and configuration - name: Membership description: Native Token Rails membership tiers, checkout, and auto-renew - name: Billing description: Recurring billing agreements funded by AP2 open mandates - name: Tokens description: >- Register an ERC-20 contract (including B20 tokens) for DIRECT credential settlement - name: Fees description: Prepaid MAG3NT fee meter for DIRECT settlement overage - name: Marketplace description: >- List and transfer credential businesses (proof of record) on the mag3nt marketplace - name: Credential Tokens description: Credential Token (CT) launch and Uniswap V4 markets - name: Holdings description: Account-wide Credential Token balances externalDocs: description: mag3nt documentation url: https://docs.mag3nt.com paths: /api/cards/{id}/launch-crt: post: tags: - Credential Tokens summary: Launch a Credential Token for an owned credential description: > Mints a fixed-supply B20 Asset representing a claim on the credential's future revenue. Charges the MAG3NT launch fee from the owner's own wallet (never the credential's holder). One CRT per credential; a second launch returns the existing one. Deploys on-chain synchronously when possible, else leaves it PENDING_DEPLOY for the deploy cron to retry. operationId: credentialTokensLaunch parameters: - name: id in: path required: true schema: type: string requestBody: required: true content: application/json: schema: type: object required: - name - symbol - supply properties: name: type: string symbol: type: string supply: type: number revenue_share_bps: type: integer description: >- Basis points of future revenue routed to CRT holders, capped by an operator-tunable maximum. allocations: type: array description: >- Must sum exactly to supply. Defaults to a single allocation of the full supply to "creator". items: type: object properties: to: type: string description: >- An EVM address or a known bucket label (creator, treasury). amount: type: number decimals: type: integer default: 18 fee_approve_tx: type: string description: >- On-chain approve tx hash authorizing the treasury to pull the MAG3NT launch fee, for external (non-managed) wallets. responses: '200': description: CRT launched (or PENDING_DEPLOY) content: application/json: schema: type: object properties: success: type: boolean crt: $ref: '#/components/schemas/CrtToken' '400': description: Invalid name/symbol/supply/allocations content: application/json: schema: $ref: '#/components/schemas/Error' '402': description: >- Insufficient MAG3NT to pay the launch fee, or payment required/invalid content: application/json: schema: type: object properties: error: type: string code: type: string example: INSUFFICIENT_MAG3NT '403': description: Credential not owned by caller content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Credential not found content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: >- Credential is encumbered, already transferred, or fee payment is still pending content: application/json: schema: type: object properties: error: type: string code: type: string components: schemas: CrtToken: type: object description: >- A Credential Token (CT) - a fixed-supply B20 Asset claim on a credential's future revenue. properties: id: type: string example: crt_mag3nt_abc123 cardId: type: string creator: type: string tokenAddress: type: string description: Empty until deployed on-chain. name: type: string symbol: type: string supply: type: number decimals: type: integer revenueShareBps: type: integer allocations: type: array items: type: object properties: to: type: string amount: type: number minter: type: string description: >- Always the platform distributor/operator, never the creator (no creator MINT_ROLE). status: type: string enum: - PENDING_DEPLOY - DEPLOYED deployTx: type: string Error: type: object required: - error properties: error: type: string example: Card not found securitySchemes: ApiKeyAuth: type: apiKey in: header name: Authorization description: API key prefixed with 'Bearer sx_live_...' ````