# QuietSignal Approval Scan — EVM Wallet Token Approval Facts

> QuietSignal Approval Scan — EVM Wallet Token Approval Facts is a paid API for AI agents from 83-29-153-50.sslip.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns on-chain token approval facts for a given EVM address, including approval count and unlimited-like approval detection, over a specified block range.

## Facts

- Endpoint: GET https://83-29-153-50.sslip.io/v1/approval-scan
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quietsignal-approval-scan-evm-wallet-token-approval-facts-10431711
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AD5033Of_P6ckmLdZ49bR

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 quietsignal-approval-scan-evm-wallet-token-approval-facts-10431711
```

Example prompt: Can you scan 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 for all token approvals on-chain and tell me how many are unlimited-like?

## When to prefer this

Use this endpoint when you need an independent, read-only audit of token approvals for any EVM wallet address, especially when checking for risky unlimited-like allowances. Prefer it over block explorer UIs when you need machine-readable, structured approval facts for programmatic agent workflows. It is particularly useful for DeFi security checks, pre-transaction risk assessment, or wallet hygiene audits.

## Known failure modes

- Missing required 'address' parameter returns a 400 or validation error
- Invalid or non-EVM-format address returns an error
- Payment not provided or insufficient USDC results in HTTP 402 payment required
- Requested block range outside available data returns empty or partial results
- Network or RPC backend issues may return 5xx errors

## How this service works

QuietSignal Public Data: independent, read-only rollup, wallet, opportunity, and developer-data facts for agents, paid per request with USDC over HTTP 402 on Base.

## Output

A JSON object containing the queried wallet address, the block range inspected (from_block, to_block), a list of approval events, total approval_count, unlimited_like_count (approvals with very high or max allowance), schema version identifier, and a disclaimer that results are observed on-chain facts only.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Public 20-byte EVM address to inspect"
      },
      "to_block": {
       "type": "integer",
       "minimum": 0,
       "description": "Optional inclusive ending block"
      },
      "from_block": {
       "type": "integer",
       "minimum": 0,
       "description": "Optional inclusive starting block; defaults to the latest bounded window"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "owner": "0x0000000000000000000000000000000000000000",
  "range": {
   "to_block": 2,
   "from_block": 1
  },
  "schema": "approval-facts/v1",
  "approvals": [],
  "disclaimer": "Observed on-chain facts only; not a security guarantee, investment advice, or remediation instruction.",
  "approval_count": 0,
  "unlimited_like_count": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quietsignal-approval-scan-evm-wallet-token-approval-facts-10431711/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 83-29-153-50.sslip.io](https://www.zero.xyz/host/83-29-153-50.sslip.io/llms.txt)