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Polygon Bridge Amount Consistency Validator
x402
Polygon Bridge Amount Consistency Validator is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-13).
Validates that token amounts are consistent across stages of a Polygon PoS bridge transaction (lock, mint, burn, exit)
Price / call$0.015
Success—
StatusUnknown
How this service works
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Output
Returns a JSON analysis including whether amounts are consistent across supplied bridge stages, a list of missing stages not yet evidenced, any warnings about token mechanics (e.g. fees, rebases), the accepted chain IDs, the bridge model description, and the completion policy. Also includes a status field and a SHA-256 hash of the result for auditability.
Example use cases
Detect mismatch in bridged token amount
“I just bridged 500 USDC from Ethereum to Polygon using the Polygon PoS bridge and I want to verify the locked amount on Ethereum matches what was minted on Polygon — can you run an amount consistency check on this transaction data and tell me if everything lines up?”
Identify missing bridge stages in audit
“I'm auditing a cross-chain transfer on Polygon PoS and I have evidence for the lock and burn stages but I'm not sure if mint and exit are accounted for — can you check this bridge transaction JSON for missing stages and flag any inconsistencies?”
Validate rebase token bridge integrity
“We're bridging a rebase token over the Polygon PoS bridge and I need to verify the amounts are consistent across all four stages — lock, mint, burn, and exit — given that fees apply. Here's the full transaction data including the token mechanics.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/polygon_bridge_amount_consistency/invokeWhen to prefer
Use this endpoint when you need to programmatically verify that amounts flowing through a Polygon PoS bridge are consistent across transaction stages, especially when auditing cross-chain transfers, building bridge monitoring tools, or validating that end users received the correct token amounts. Prefer this over manual inspection when you have structured transaction data and need a fast, deterministic consistency check with clear stage-by-stage analysis.
Side effects
- Incomplete transaction data with missing required fields results in analysis flagging missing stages
- Token mechanics (fees, rebases) not supplied in the request lead to warnings that amounts may be inaccurate
- Invalid or unsupported chain IDs not in the accepted set (137, 80002) may cause analysis errors
- Malformed JSON in request_json field returns a validation error
- Caller-supplied data only — no on-chain verification is performed, so accuracy depends entirely on input quality
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Token mechanics such as fees/rebases must be explicitly supplied."
],
"service_id": "polygon_bridge_amount_consistency",
"analysis_json": "{\"amounts\":[{\"amount_atomic\":\"100\",\"stage\":\"lock\"}],\"consistent\":true,\"missing_stages\":[\"mint\",\"burn\",\"exit\"],\"network_context\":{\"accepted_chain_ids\":[\"137\",\"80002\"],\"bridge_model\":\"root-child state sync plus checkpoint evidence\",\"completion_policy\":\"never inferred without supplied evidence\",\"protocol_family\":\"Polygon PoS\"}}",
"evidence_scope": "caller_supplied_data",
"analyzed_network": "polygon"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "polygon_bridge_amount_consistency",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "15000",
"resultSha256": "9c59908478ded7f1d441772a92fe929f05246e4a9b06c00dd6d8e3304d7e4fa9",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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