# Suggested EIP-1559 Priority Fee (Miner Tip)

> Suggested EIP-1559 Priority Fee (Miner Tip) is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).

Returns the current suggested EIP-1559 priority fee (miner tip) for a specified EVM-compatible blockchain network

## Facts

- Endpoint: POST https://twin.unykorn.org/evm-priority-fee?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/suggested-eip-1559-priority-fee-miner-tip-3aed2aa1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z3NEeGSz83Pjf3mwMjAfo

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 suggested-eip-1559-priority-fee-miner-tip-3aed2aa1 -d '<json body>'
```

Example prompt: What's the suggested EIP-1559 priority fee I should use for a transaction on the Base network right now?

## When to prefer this

Choose this endpoint when your agent needs a real-time, pay-per-call EIP-1559 priority fee suggestion for one of ten supported EVM chains without running your own node infrastructure. It is ideal for transaction-sending workflows, gas optimization logic, or DeFi agents that need a reliable miner tip recommendation on-demand. Prefer this over self-hosted RPC solutions when minimizing infrastructure overhead and paying only per query ($0.002 USDC) is acceptable.

## Known failure modes

- Invalid or unsupported chain name returns an error — only the ten enumerated chains (ethereum, base, polygon, arbitrum, optimism, bsc, avalanche, gnosis, linea, scroll) are supported
- Payment failure via x402 protocol prevents the call from completing
- Network congestion or RPC node unavailability on the queried chain may cause a delayed or failed response
- Malformed request body missing the chain parameter returns a validation error

## How this service works

Suggested EIP-1559 priority fee (miner tip) — Genesis402 / UnyKorn Operator Network

## Output

Returns a JSON object with ok:true, a type field identifying the response as 'evm-priority-fee', a payment receipt object containing the transaction hash, USD amount charged, and a receipt ID, plus a generated_at ISO 8601 timestamp. The priority fee value itself is part of the response payload for the queried chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "params": {
   "type": "object",
   "properties": {
    "chain": {
     "enum": [
      "ethereum",
      "base",
      "polygon",
      "arbitrum",
      "optimism",
      "bsc",
      "avalanche",
      "gnosis",
      "linea",
      "scroll"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "type": "evm-priority-fee",
  "receipt": {
   "tx_hash": "0x<64hex>",
   "amount_usd": 0.002,
   "receipt_id": "g402-<16hex>"
  },
  "generated_at": "<iso8601>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/suggested-eip-1559-priority-fee-miner-tip-3aed2aa1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from twin.unykorn.org](https://www.zero.xyz/host/twin.unykorn.org/llms.txt)