# Northline Crypto Gas Price API

> Northline Crypto Gas Price API is a paid API for AI agents from 206-81-14-131.sslip.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).

Returns current Ethereum and EVM-compatible blockchain gas prices, paid per-call via x402 USDC micropayment on Base

## Facts

- Endpoint: GET https://206-81-14-131.sslip.io/svc/crypto-prices/gas?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/northline-crypto-gas-price-api-ef60e0b7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J5W85p3BfauxhQv8tFS_z

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 northline-crypto-gas-price-api-ef60e0b7
```

Example prompt: What are the current Ethereum gas prices right now — base fee, priority fee, and estimated cost for a standard transaction?

## When to prefer this

Choose this endpoint when you need real-time gas price data for Ethereum or EVM-compatible chains without API key setup, paying only $0.003 USDC per call via x402 micropayment. Prefer this over free public gas oracles when operating in an agent context that already supports x402 payments and needs reliable, on-demand gas data.

## Known failure modes

- Payment not included or insufficient USDC — returns HTTP 402 requiring x402 payment
- Upstream gas oracle unavailable — may return 503 or stale data
- Invalid network/chain parameter — returns 400 with error message
- Rate limiting or temporary node unavailability

## How this service works

Pay-per-call APIs, paid downloads and work-on-request for agents. Payment: x402 (USDC on Base, eip155:8453), no accounts or API keys. Catalog: https://206-81-14-131.sslip.io/?format=json. Agent guide: https://206-81-14-131.sslip.io/llms.txt

## Output

Returns current gas price data for EVM-compatible blockchains, including base fee, priority fee (tip), and fast/standard/slow gas price tiers in gwei, enabling agents to estimate transaction costs before submission.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/northline-crypto-gas-price-api-ef60e0b7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 206-81-14-131.sslip.io](https://www.zero.xyz/host/206-81-14-131.sslip.io/llms.txt)