# Permit2 Approval Friction Explainer

> Permit2 Approval Friction Explainer is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Analyzes and explains the user-experience friction introduced by Permit2 approval flows for a given token, network, and transfer method combination on public blockchains.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-permit2-approval-friction-explainer
- 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/permit2-approval-friction-explainer-4a971274
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ovNP7glmGYt-6Ea4R0Yan

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 permit2-approval-friction-explainer-4a971274 -d '<json body>'
```

Example prompt: Can you analyze the Permit2 approval friction for transferring USDC on Base using the permit2 transfer method, where a gas sponsor is present but EIP-3009 is not supported?

## When to prefer this

Choose this endpoint when you need a structured, explainable breakdown of why Permit2 approval steps create friction for a specific token-network-transfer combination — especially useful for dapp developers, wallet teams, or payment integrators evaluating which transfer method minimizes user drop-off. Prefer this over generic blockchain explorers when you need UX-oriented friction analysis rather than raw transaction data.

## Known failure modes

- Missing required fields (network, token, transfer_method) returns validation error
- Invalid mode value (must be 'analyze') causes rejection
- Unknown token or network identifiers may produce incomplete analysis
- Conflicting flags (e.g. permit2_supported_present false but transfer_method is permit2) may yield inconsistent output
- Payment failure via x402 protocol results in 402 response before analysis is performed

## How this service works

Choose Blockchain Money Map for human-readable public blockchain reports or x402-paid agent API services.

## Output

A JSON response containing an explanation of the UX friction introduced by the Permit2 approval flow for the specified token, network, and transfer method. May include friction factors, comparison against reference facts if provided, and policy-driven analysis of approval requirements and signature-based transfer alternatives.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "analyze"
   ]
  },
  "facts": {
   "type": "object",
   "required": [
    "network",
    "token",
    "transfer_method"
   ],
   "properties": {
    "token": {
     "type": "string",
     "maxLength": 500
    },
    "network": {
     "type": "string",
     "maxLength": 500
    },
    "transfer_method": {
     "type": "string",
     "maxLength": 500
    },
    "gas_sponsor_present": {
     "type": "boolean"
    },
    "approval_required_present": {
     "type": "boolean"
    },
    "eip3009_supported_present": {
     "type": "boolean"
    },
    "permit2_supported_present": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "reference_facts": {
   "type": "object",
   "required": [
    "network",
    "token",
    "transfer_method"
   ],
   "properties": {
    "token": {
     "type": "string",
     "maxLength": 500
    },
    "network": {
     "type": "string",
     "maxLength": 500
    },
    "transfer_method": {
     "type": "string",
     "maxLength": 500
    },
    "gas_sponsor_present": {
     "type": "boolean"
    },
    "approval_required_present": {
     "type": "boolean"
    },
    "eip3009_supported_present": {
     "type": "boolean"
    },
    "permit2_supported_present": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/permit2-approval-friction-explainer-4a971274/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchainmoneymap.com](https://www.zero.xyz/host/api.blockchainmoneymap.com/llms.txt)