# EFUEL Prepaid Execution Credits (SqueezOS via x402)

> EFUEL Prepaid Execution Credits (SqueezOS via x402) is a paid API for AI agents from mcp-x402.onrender.com, paid per call via x402, $1/call, status unknown (last checked 2026-10-29).

Issues wallet-bound EFUEL execution credits after USDC payment settlement via the x402 protocol, at a rate of 1 USDC = 100 EFUEL credits.

## Facts

- Endpoint: GET https://mcp-x402.onrender.com/gate/squeezeos/api/efuel/credits?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/efuel-prepaid-execution-credits-squeezos-via-x402-17f62751
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UG4o9n8Rgm-2hMqO70OIc

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 efuel-prepaid-execution-credits-squeezos-via-x402-17f62751
```

Example prompt: Pay 1 USDC via x402 and issue me 100 EFUEL prepaid execution credits bound to my wallet for use with the SML ECHO system.

## When to prefer this

Choose this endpoint when you need to programmatically purchase non-transferable EFUEL execution credits for SML ECHO or SqueezOS agent workflows using USDC via the x402 protocol. Ideal for agents that need to autonomously fund their own execution budget without manual intervention. Prefer this over generic payment APIs when the downstream system specifically requires EFUEL credits.

## Known failure modes

- Payment amount outside $1–$100 range results in rejection
- Malformed or missing x402 payment header causes 402 Payment Required response
- USDC settlement not confirmed on-chain leads to credit issuance failure
- Wallet address missing or invalid prevents credit binding
- Service unavailable if Render.com hosting is down

## How this service works

EFUEL prepaid execution credit API — issue wallet-bound SML ECHO Fuel execution credits after exact canonical x402 Base/USDC settlement; $1-$100 per call, 1 USDC = 100 EFUEL, non-transferable.

## Output

Returns a JSON object confirming the EFUEL credit issuance, including the number of EFUEL credits allocated (1 USDC = 100 EFUEL), wallet binding details, and settlement confirmation after the x402 Base/USDC payment is verified. Credits are non-transferable and wallet-bound.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "usdc": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/efuel-prepaid-execution-credits-squeezos-via-x402-17f62751/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-x402.onrender.com](https://www.zero.xyz/host/mcp-x402.onrender.com/llms.txt)