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Otto AI x402 — Cross-Chain Bridge
x402
Otto AI x402 — Cross-Chain Bridge is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Bridges tokens from one blockchain network to another (e.g., Base to Arbitrum), returning a transaction hash and estimated completion time.
Price / call$0.01
Success—
StatusUnknown
How this service works
Cross-chain token bridging via LiFi aggregator. Move tokens between Base, Ethereum, Arbitrum, Optimism, Polygon, BSC, Avalanche, and Solana with best-route execution across all major bridges.
Output
Returns a JSON object with a success flag, the source chain (fromChain), destination chain (toChain), the on-chain bridge transaction hash (bridgeTxHash starting with 0x...), and an estimated completion time in seconds (e.g. 180 seconds for Base to Arbitrum).
Example use cases
Example prompt
“Bridge my USDC from Base to Arbitrum — I want to move about 100 USDC and need to know when it'll complete.”
Technical details
Endpoint
POSThttps://x402.ottoai.services/bridgeWhen to prefer
Use this endpoint when you need to programmatically move tokens between supported blockchain networks (Base, Polygon, Arbitrum, Solana, Ethereum) via a pay-per-call x402 micropayment model. Prefer this over manual bridge UIs when automating DeFi workflows or agent-driven cross-chain asset management within the Otto AI ecosystem.
Side effects
- Unsupported chain pair — returns error if fromChain/toChain combination is not supported
- Insufficient balance — transaction fails if wallet lacks enough tokens
- Payment failure — x402 USDC micropayment not confirmed, call rejected
- Bridge congestion — estimated completion time may be significantly higher than usual
- Invalid wallet address — malformed address returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| amount | number | Amount to bridge (human-readable). Decimals are derived server-side — do NOT send fromDecimals. |
| toSymbol | string | Destination token: a known symbol OR a 0x contract address, resolved on the DESTINATION chain. |
| toChainId | number | Destination chain ID |
| fromSymbol | string | Source token: a known symbol OR a 0x contract address, resolved on the SOURCE chain. Ambiguous symbols are rejected (HTTP 400) with candidates. |
| fromChainId | number | Source chain ID (8453 Base, 1 Ethereum, 42161 Arbitrum, 137 Polygon, 56 BSC, 43114 Avalanche, 10 Optimism) |
| tokenSource | string | Funds source (default: auto) |
| toTokenAddress | string | Destination token contract address (alternative to toSymbol). |
| fromTokenAddress | string | Source token contract address (alternative to fromSymbol). If both are sent and disagree, the request is rejected. |
Output
Schema · Response
{
"type": "json",
"example": {
"success": true,
"toChain": "Arbitrum",
"fromChain": "Base",
"bridgeTxHash": "0x...",
"estimatedCompletionSeconds": 180
}
}Tags
x402
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