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

# Pricing

> x402 pricing for Agentic API operations: free prepare, paid send.

Preparing a transaction (building the unsigned calldata) is **free**. The x402 USDC charge is collected only at `POST /send-transactions`, when Brickken broadcasts the operation. The send price below carries the full per-operation cost.

Prices are in USDC on **Base mainnet**.

| Method                                          | Prepare |   Send |
| ----------------------------------------------- | ------: | -----: |
| `agentRegister`                                 |  `0.00` | `0.98` |
| `agentSetURI`                                   |  `0.00` | `0.48` |
| `agentSetMetadata`                              |  `0.00` | `0.48` |
| `agentSetWallet`                                |  `0.00` | `0.98` |
| `agentTransferOwnership`                        |  `0.00` | `0.98` |
| `agentGiveFeedback`                             |  `0.00` | `0.24` |
| `agentRevokeFeedback`                           |  `0.00` | `0.24` |
| `agentAppendFeedbackResponse`                   |  `0.00` | `0.48` |
| `agentCreateToken`                              |  `0.00` | `9.98` |
| `agentMintToken`                                |  `0.00` | `0.10` |
| `agentBurnToken`                                |  `0.00` | `0.04` |
| `agentTransferToken`                            |  `0.00` | `0.04` |
| `agentTransferFromToken`                        |  `0.00` | `0.04` |
| `agentApproveToken`                             |  `0.00` | `0.02` |
| `newTokenizedAgent` (legacy registration alias) |  `0.00` | `2.98` |

Sandbox, Base Sepolia, and other non-production environments use a flat reference price of `0.01` USDC per send.

<Note>
  The exact amount, asset, and chain are always quoted in the `PAYMENT-REQUIRED` header of the `402` response (and previewed in the prepare response's `x402Requirements`). Read them from there rather than hardcoding the table above.
</Note>

<Warning>
  x402 payments and on-chain transactions are non-refundable. Confirm chain, signer/recipient, token address, and expected USDC price before paying.
</Warning>