> For the complete documentation index, see [llms.txt](https://docs.afx.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.afx.xyz/api-reference/exchange/authorization.md).
# Authorization
## Approve Agent
> Authorize an Agent wallet to trade on behalf of the Master wallet.\
> \
> \*\*Signature:\*\* Master · \*\*No protobuf\*\* — fields are signed directly via EIP-712.\
> \
> To revoke the current Agent wallet, submit the same \`approveAgent\` action with \`agentAddress\` set to \`0x0000000000000000000000000000000000000000\` and \`validitySeconds\` set to \`0\`. The Python SDK exposes this as \`client.exchange.revoke\_agent(...)\`.\
> \
> \*\*EIP-712 type:\*\*\
> \`\`\`json\
> {\
> "ApproveAgent": \[\
> { "name": "dexChain", "type": "string" },\
> { "name": "agentAddress", "type": "address" },\
> { "name": "agentName", "type": "string" },\
> { "name": "validitySeconds", "type": "uint64" },\
> { "name": "nonce", "type": "uint64" },\
> { "name": "expiryAfter", "type": "uint64" }\
> ]\
> }\
> \`\`\`\
> \`validitySeconds\` is the agent authorization duration. \`0\` means the authorization is valid for 7 days; maximum 365 days.\
> Domain name: \`"SignTransaction"\`
````json
{"openapi":"3.0.3","info":{"title":"AFX DEX Exchange API","version":"1.0.0"},"servers":[{"url":"https://api.afx.xyz","description":"Mainnet"},{"url":"https://api-testnet.afx.xyz","description":"Testnet"}],"paths":{"/exchange/approveAgent":{"post":{"operationId":"approveAgent","summary":"Approve Agent","tags":["Authorization"],"description":"Authorize an Agent wallet to trade on behalf of the Master wallet.\n\n**Signature:** Master · **No protobuf** — fields are signed directly via EIP-712.\n\nTo revoke the current Agent wallet, submit the same `approveAgent` action with `agentAddress` set to `0x0000000000000000000000000000000000000000` and `validitySeconds` set to `0`. The Python SDK exposes this as `client.exchange.revoke_agent(...)`.\n\n**EIP-712 type:**\n```json\n{\n \"ApproveAgent\": [\n { \"name\": \"dexChain\", \"type\": \"string\" },\n { \"name\": \"agentAddress\", \"type\": \"address\" },\n { \"name\": \"agentName\", \"type\": \"string\" },\n { \"name\": \"validitySeconds\", \"type\": \"uint64\" },\n { \"name\": \"nonce\", \"type\": \"uint64\" },\n { \"name\": \"expiryAfter\", \"type\": \"uint64\" }\n ]\n}\n```\n`validitySeconds` is the agent authorization duration. `0` means the authorization is valid for 7 days; maximum 365 days.\nDomain name: `\"SignTransaction\"`\n","requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApproveAgentRequest"}}}},"responses":{"200":{"$ref":"#/components/responses/ExchangeOk"}}}}},"components":{"schemas":{"ApproveAgentRequest":{"type":"object","required":["action","signature","nonce"],"properties":{"action":{"type":"object","required":["type","agentAddress","agentName","validitySeconds","dexChain"],"properties":{"type":{"type":"string","enum":["approveAgent"]},"agentAddress":{"type":"string","description":"Agent wallet address (0x hex)"},"agentName":{"type":"string","default":"app.afx.xyz","description":"Agent name. SDK default: app.afx.xyz"},"validitySeconds":{"type":"integer","format":"int64","description":"Agent authorization duration in seconds. 0 means the authorization is valid for 7 days; maximum 365 days."},"dexChain":{"type":"string","enum":["Mainnet","Testnet"]},"referralCode":{"type":"string","description":"Referral code (only effective on first approve)"}}},"signature":{"$ref":"#/components/schemas/Signature"},"nonce":{"type":"integer","format":"int64","description":"Request nonce as a Unix timestamp in milliseconds. Recommended: current time in milliseconds. Must be unique; do not reuse the same nonce for another signed request."},"expiryAfter":{"type":"integer","format":"int64","nullable":true,"description":"Unix timestamp in milliseconds after which the request expires. null = no expiry; use 0 in the signature payload when this field is null."}}},"Signature":{"type":"object","required":["r","s","v"],"properties":{"r":{"type":"string","description":"32-byte hex, zero-padded to 64 chars"},"s":{"type":"string","description":"32-byte hex, zero-padded to 64 chars"},"v":{"type":"integer","description":"27 or 28"}}},"ExchangeResponse":{"type":"object","properties":{"code":{"type":"integer","description":"`0` = success. See Error Codes section for non-zero values."},"message":{"type":"string"},"data":{"type":"object","nullable":true,"properties":{"txHash":{"type":"string"},"txCode":{"type":"integer"},"txMsg":{"type":"string"}}}}}},"responses":{"ExchangeOk":{"description":"Transaction submitted","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExchangeResponse"}}}}}}}
````
## Withdraw
> Withdraw funds from DEX to an external address.\
> \
> \*\*Signature:\*\* Master · \*\*No protobuf\*\*\
> \
> \*\*EIP-712 type:\*\*\
> \`\`\`json\
> {\
> "Withdraw": \[\
> { "name": "dexChain", "type": "string" },\
> { "name": "destination", "type": "address" },\
> { "name": "amount", "type": "string" },\
> { "name": "withdrawSequence", "type": "uint64" },\
> { "name": "nonce", "type": "uint64" },\
> { "name": "expiryAfter", "type": "uint64" }\
> ]\
> }\
> \`\`\`\
> Domain name: \`"SignTransaction"\`. \`dexChain\` is determined by the server environment. \`withdrawSequence\` is included in both the action body and the signed EIP-712 message. If omitted in the Python SDK, it defaults to the request \`nonce\`.\
> \
> For withdrawals, use a longer \`expiryAfter\` window, such as current Unix time in milliseconds + 3,600,000.\
> The minimum mainnet withdrawal amount is 2 USDC.
````json
{"openapi":"3.0.3","info":{"title":"AFX DEX Exchange API","version":"1.0.0"},"servers":[{"url":"https://api.afx.xyz","description":"Mainnet"},{"url":"https://api-testnet.afx.xyz","description":"Testnet"}],"paths":{"/exchange/withdraw":{"post":{"operationId":"withdraw","summary":"Withdraw","tags":["Authorization"],"description":"Withdraw funds from DEX to an external address.\n\n**Signature:** Master · **No protobuf**\n\n**EIP-712 type:**\n```json\n{\n \"Withdraw\": [\n { \"name\": \"dexChain\", \"type\": \"string\" },\n { \"name\": \"destination\", \"type\": \"address\" },\n { \"name\": \"amount\", \"type\": \"string\" },\n { \"name\": \"withdrawSequence\", \"type\": \"uint64\" },\n { \"name\": \"nonce\", \"type\": \"uint64\" },\n { \"name\": \"expiryAfter\", \"type\": \"uint64\" }\n ]\n}\n```\nDomain name: `\"SignTransaction\"`. `dexChain` is determined by the server environment. `withdrawSequence` is included in both the action body and the signed EIP-712 message. If omitted in the Python SDK, it defaults to the request `nonce`.\n\nFor withdrawals, use a longer `expiryAfter` window, such as current Unix time in milliseconds + 3,600,000.\nThe minimum mainnet withdrawal amount is 2 USDC.\n","requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/WithdrawRequest"}}}},"responses":{"200":{"$ref":"#/components/responses/ExchangeOk"}}}}},"components":{"schemas":{"WithdrawRequest":{"type":"object","required":["action","signature","nonce"],"properties":{"action":{"type":"object","required":["type","destination","amount"],"properties":{"type":{"type":"string","enum":["withdraw"]},"destination":{"type":"string","description":"Recipient address (0x hex)"},"amount":{"type":"string","description":"Withdrawal amount. Minimum mainnet withdrawal: 2 USDC."}}},"signature":{"$ref":"#/components/schemas/Signature"},"nonce":{"type":"integer","format":"int64","description":"Request nonce as a Unix timestamp in milliseconds. Recommended: current time in milliseconds. Must be unique; do not reuse the same nonce for another signed request."},"expiryAfter":{"type":"integer","format":"int64","nullable":true,"description":"Unix timestamp in milliseconds after which the request expires. For withdrawals, use a longer window such as current time + 3,600,000 milliseconds. null = no expiry; use 0 in the signature payload when this field is null."}}},"Signature":{"type":"object","required":["r","s","v"],"properties":{"r":{"type":"string","description":"32-byte hex, zero-padded to 64 chars"},"s":{"type":"string","description":"32-byte hex, zero-padded to 64 chars"},"v":{"type":"integer","description":"27 or 28"}}},"ExchangeResponse":{"type":"object","properties":{"code":{"type":"integer","description":"`0` = success. See Error Codes section for non-zero values."},"message":{"type":"string"},"data":{"type":"object","nullable":true,"properties":{"txHash":{"type":"string"},"txCode":{"type":"integer"},"txMsg":{"type":"string"}}}}}},"responses":{"ExchangeOk":{"description":"Transaction submitted","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExchangeResponse"}}}}}}}
````
---
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Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
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