# MyceliaSignal Ethereum Gas Price Oracle (Ed25519 Signed)

> MyceliaSignal Ethereum Gas Price Oracle (Ed25519 Signed) is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16, last successful call 2026-05-28).

Returns the current Ethereum network gas price with cryptographic Ed25519 attestation, sourced from multiple RPC providers and aggregated via median.

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/gas/ethereum
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Last successful call: 2026-05-28
- Success rate: 100% of calls made through Zero
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-myceliasignal-com-dded3744
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HEGaVElqTUN8er0NLEPnV

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-dded3744
```

Example prompt: What's the current Ethereum gas price right now — I need a cryptographically signed median reading aggregated from multiple RPC nodes, including the USD cost for a standard 21,000-gas transfer?

## When to prefer this

Use this endpoint when you need a tamper-evident, multi-source aggregated Ethereum gas price with Ed25519 cryptographic attestation — ideal for smart contract oracle feeds, audit trails, cross-chain verification, or any workflow requiring a trustless, signed proof of the current gas price rather than a raw unauthenticated API response.

## Known failure modes

- RPC source unavailability may reduce source count or cause stale data
- Signature verification failure if public key or canonical string is malformed
- HTTP 402 if payment header is missing or USDC balance insufficient
- Timeout if multiple upstream RPC endpoints are slow simultaneously
- Malformed response if chain is temporarily congested or undergoing upgrades

## How this service works

Ethereum mainnet gas price — current base fee and priority fee for ETH transaction cost estimation — Ed25519 signed attestation

## Output

Returns a JSON object with: Ethereum chain ID (1), median gas price in Gwei, base fee in Gwei, estimated transaction cost in USD and native ETH, current ETH/USD price, number of sources queried, an Ed25519 signature over a canonical string, the signer's public key, and a UTC timestamp. The canonical field encodes key values in a pipe-delimited string suitable for on-chain or off-chain 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-dded3744/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)