# MyeliaSignal Polygon Gas Price Oracle

> MyeliaSignal Polygon Gas Price Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns the current Polygon network gas price as a cryptographically signed (Ed25519) attestation with median aggregation across multiple RPC sources

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/gas/polygon
- 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/api-myceliasignal-com-c9f9c41a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ND0atS8Ht6jUwW7b51MMS

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 api-myceliasignal-com-c9f9c41a
```

Example prompt: What's the current gas price on the Polygon network? I need a cryptographically signed attestation with the median price in Gwei, the USD transaction cost for a standard transfer, and the Ed25519 signature I can verify.

## When to prefer this

Use this endpoint when you need a verifiable, cryptographically signed Polygon gas price that can be independently validated using Ed25519 signature verification. Prefer this over raw RPC calls when you need an auditable, tamper-evident price feed aggregated from multiple sources, or when building smart contract systems, payment estimators, or compliance tools that require signed oracle data on the Polygon (chain ID 137) network.

## Known failure modes

- Network or RPC source unavailability — may return partial data or error if both polygon.drpc.org and polygon-bor-rpc.publicnode.com are unreachable
- Payment failure — x402 protocol payment of $0.01 USDC not completed, returns 402 Payment Required
- Rate limiting or quota exceeded — returns HTTP 429
- Stale data — timestamp may lag if upstream RPC nodes are slow

## How this service works

Polygon gas price — current transaction fee for Polygon PoS network — Ed25519 signed attestation

## Output

Returns a JSON object containing: current Polygon gas price in Gwei (median across sources), base fee in Gwei, estimated transaction cost in USD and native POL, the native token symbol (POL) and its USD price, source count, chain ID (137), an Ed25519 signature over a canonical string, the signing public key, and an ISO 8601 timestamp. The canonical field is a pipe-delimited string summarizing the attestation for easy verification.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-myceliasignal-com-c9f9c41a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.myceliasignal.com](https://www.zero.xyz/host/api.myceliasignal.com/llms.txt)