# SignalHarness Solana SPL Approval Analyzer

> SignalHarness Solana SPL Approval Analyzer is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-15).

Analyzes Solana SPL token approval and transfer instructions in a transaction to identify delegation changes, transfer actions, and associated risk flags.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/solana_spl_approval_analyze/invoke
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-solana-spl-approval-analyzer-25251092
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_62XVdvS9MJ-hjx0WwFTpf

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability signalharness-solana-spl-approval-analyzer-25251092 -d '<json body>'
```

Example prompt: Can you analyze this Solana transaction JSON and tell me if it contains any risky SPL token approvals or unexpected delegate authority changes?

## When to prefer this

Use this endpoint when you need to statically analyze caller-supplied Solana SPL token approval or transfer instructions — for example, to audit a transaction before signing, to build wallet security warnings, or to investigate a suspicious transaction. It is a static analysis tool that works on provided data without querying live blockchain state, so prefer it for fast, offline-style checks. It should not be used when you need real-time on-chain authority or allowance lookups.

## Known failure modes

- Malformed or invalid JSON input returns a parse error
- Service explicitly does not query on-chain state, so current authority or allowance accuracy is not guaranteed
- Very large transaction JSON may exceed the 65536-character input limit
- Missing or empty request_json field will fail validation
- Network or payment failures may prevent execution

## How this service works

Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.

## Output

Returns a structured analysis including a list of changes (account, action, amount, authority, delegate, index), a list of risk flags, the analyzed network (solana), evidence scope (caller_supplied_data), and the service ID. Also includes a receipt with payment and execution metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "request_json": {
   "type": "string",
   "maxLength": 65536,
   "minLength": 2
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Does not query current authority or allowance state."
   ],
   "service_id": "solana_spl_approval_analyze",
   "analysis_json": "{\"changes\":[{\"account\":\"11111111111111111111111111111111\",\"action\":\"transfer\",\"amount_atomic\":null,\"authority\":null,\"delegate\":null,\"index\":0}],\"risk_flags\":[]}",
   "evidence_scope": "caller_supplied_data",
   "analyzed_network": "solana"
  },
  "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": "solana_spl_approval_analyze",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "15000",
   "resultSha256": "b096565c56054d1696805b6fb6c060e39346048b2ef371f51f8ee99d128a0f10",
   "serviceVersion": "1.0.0",
   "settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
  },
  "artifacts": [],
  "requestId": "example-request",
  "executionId": "example-execution"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signalharness-solana-spl-approval-analyzer-25251092/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalharness.ai](https://www.zero.xyz/host/signalharness.ai/llms.txt)