# Saylor Innovations EVM Gas Price

> Saylor Innovations EVM Gas Price is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).

Returns current gas prices (gwei, base fee, next base fee, slow/standard/fast priority tips) and plain-transfer cost for any of 16 supported EVM chains.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/chain/gas-price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-evm-gas-price-663689fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_peWWGgUHPFyHaQZXiheO7

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 saylor-innovations-evm-gas-price-663689fe
```

Example prompt: What's the current gas price on Arbitrum — give me the base fee, next base fee, and slow/standard/fast priority tips in gwei, plus what a plain ETH transfer would cost right now?

## When to prefer this

Use this endpoint when you need real-time, per-block gas price intelligence for any of 16 popular EVM chains, including EIP-1559 base fee projections and priority tip tiers. It is especially useful for pre-transaction cost estimation, DeFi workflow automation, or gas-sensitive agent decisions. Prefer it over generic blockchain explorers when you need structured JSON with slow/standard/fast priority breakdowns and native-currency transfer cost in one call.

## Known failure modes

- Unsupported chain name or ID returns an error — only the 16 named chains are valid
- Chain RPC temporarily unavailable may return null for some fields like base_fee_gwei or block_number
- Stale data if the underlying RPC node lags behind the latest block
- Network-level errors (timeouts, 402 payment required if USDC payment not attached)
- Malformed chain query string returns validation error

## How this service works

Current gas price on 16 EVM chains: gwei, base fee, next base fee, slow, standard and fast priority tips from recent blocks, and the cost of a transfer.

## Output

A JSON object containing the queried chain name and chain ID, current gas price in both gwei and wei, EIP-1559 base fee and projected next base fee in gwei, slow/standard/fast priority fee tips derived from recent blocks, cost of a plain 21,000-gas ETH transfer in the native currency, average block fullness percentage over the last 20 blocks, latest block number, native currency symbol, data source, and a plain-language note summarising the result.

## 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",
     "required": [
      "chain"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "chain",
      "chain_id",
      "gas_price_gwei",
      "transfer_cost_native",
      "source"
     ],
     "properties": {
      "note": {
       "type": "string",
       "description": "plain-language reading of the result"
      },
      "chain": {
       "type": "string",
       "description": "the chain name that was queried"
      },
      "source": {
       "type": "string",
       "description": "where the data was read from"
      },
      "chain_id": {
       "type": "number",
       "description": "EIP-155 chain id of that network"
      },
      "block_number": {
       "type": [
        "number",
        "null"
       ],
       "description": "latest block the figures are based on"
      },
      "base_fee_gwei": {
       "type": [
        "number",
        "null"
       ],
       "description": "base fee of the latest block in gwei"
      },
      "gas_price_wei": {
       "type": "string",
       "description": "current gas price in wei, as a string"
      },
      "native_symbol": {
       "type": "string",
       "description": "native currency of the chain"
      },
      "gas_price_gwei": {
       "type": "number",
       "description": "current gas price in gwei"
      },
      "next_base_fee_gwei": {
       "type": [
        "number",
        "null"
       ],
       "description": "projected base fee of the next block in gwei"
      },
      "transfer_cost_native": {
       "type": "number",
       "description": "cost of a plain 21,000-gas transfer in the native curre
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-evm-gas-price-663689fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)