All AgentWallex API errors follow a consistent JSON format:
{
"code": "invalid_request",
"type": "invalid_request_error",
"message": "human readable error description"
}
| Field | Description |
|---|
code | Machine-readable error code (e.g., policy_violation, insufficient_funds) |
type | Error category (see table below) |
message | Human-readable description of what went wrong |
Error Types
| Type | HTTP Status | Description |
|---|
invalid_request_error | 400 | The request body or parameters are invalid |
authentication_error | 401 | Missing or invalid API key / token |
authorization_error | 403 | Valid credentials but insufficient permissions |
not_found_error | 404 | The requested resource does not exist |
rate_limit_error | 429 | Too many requests — retry after the indicated delay |
internal_error | 500 | Server-side error — contact support if persistent |
Common Error Codes
| Code | Type | Description |
|---|
policy_violation | invalid_request_error | Transaction blocked by policy engine |
insufficient_funds | invalid_request_error | Wallet balance too low for the transaction |
agent_frozen | invalid_request_error | Agent is frozen — unfreeze before transacting |
invalid_chain | invalid_request_error | Unsupported or invalid chain ID |
invalid_token | invalid_request_error | Token not supported on the specified chain |
invalid_address | invalid_request_error | Malformed recipient address |
session_expired | invalid_request_error | x402 session has expired or exceeded budget |
rate_limit_exceeded | rate_limit_error | API rate limit reached |
approval_timeout | invalid_request_error | Human approval was not granted within the timeout |
SDK Error Handling
TypeScript
The TypeScript SDK provides typed error classes for specific error types:
import {
AgentWallexError,
PolicyViolationError,
} from "@agentwallex/sdk";
try {
const tx = await aw.payments.send({
agentId: "agent_abc123",
to: "0xRecipientAddress",
amount: "50.00",
token: "USDC",
});
} catch (error) {
if (error instanceof PolicyViolationError) {
console.log(`Policy violated: ${error.rule}`);
console.log(`Details: ${error.message}`);
// Handle: adjust amount, use different address, etc.
} else if (error instanceof AgentWallexError) {
console.log(`API error [${error.code}]: ${error.message}`);
switch (error.code) {
case "insufficient_funds":
// Top up the wallet
break;
case "agent_frozen":
// Unfreeze or use a different agent
break;
case "rate_limit_exceeded":
// Wait and retry
break;
default:
// Log and alert
break;
}
} else {
// Network error or unexpected exception
console.error("Unexpected error:", error);
}
}
Python
from agentwallex import AgentWallexError, PolicyViolationError
try:
tx = await aw.payments.send(
agent_id="agent_abc123",
to="0xRecipientAddress",
amount="50.00",
token="USDC",
)
except PolicyViolationError as e:
print(f"Policy violated: {e.rule}")
print(f"Details: {e.message}")
except AgentWallexError as e:
print(f"API error [{e.code}]: {e.message}")
except Exception as e:
print(f"Unexpected error: {e}")
Retry Strategy
Use exponential backoff for retries. Only retry on rate_limit_error and internal_error. Do not retry invalid_request_error or authentication_error — those require fixing the request.
async function withRetry<T>(
fn: () => Promise<T>,
maxRetries: number = 3
): Promise<T> {
for (let attempt = 0; attempt <= maxRetries; attempt++) {
try {
return await fn();
} catch (error) {
if (
error instanceof AgentWallexError &&
(error.type === "rate_limit_error" || error.type === "internal_error") &&
attempt < maxRetries
) {
const delay = Math.pow(2, attempt) * 1000; // 1s, 2s, 4s
await new Promise(resolve => setTimeout(resolve, delay));
continue;
}
throw error;
}
}
throw new Error("Max retries exceeded");
}
// Usage
const tx = await withRetry(() =>
aw.payments.send({
agentId: "agent_abc123",
to: "0xRecipientAddress",
amount: "50.00",
token: "USDC",
})
);
HTTP Status Code Reference
| Status | Meaning | Action |
|---|
| 200 | Success | Process the response |
| 201 | Created | Resource was created successfully |
| 400 | Bad Request | Fix the request parameters |
| 401 | Unauthorized | Check your API key |
| 403 | Forbidden | Check permissions / plan tier |
| 404 | Not Found | Verify the resource ID exists |
| 429 | Rate Limited | Wait and retry with backoff |
| 500 | Server Error | Retry with backoff; contact support if persistent |
