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Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
Gas Oracle API
Live gas prices with gwei tiers, USD cost estimates, and congestion level. Time your transactions perfectly. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"gas-oracle": {
"url": "https://gas-oracle.api.klymax402.com/mcp"
}
}
}Quickstart -- HTTP (x402)
curl "https://gas-oracle.api.klymax402.com/api/price"
# -> 402 Payment Required, with an x402 payment challenge in the response bodyAny x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
gas_get_current_price | GET | /api/price | $0.003 | Get current gas prices with slow/standard/fast/instant tiers |
gas_get_current_price | POST | /api/price | $0.003 | Get current gas prices with slow/standard/fast/instant tiers (POST variant) |
gas_get_current_price
Use this when you need current gas prices before submitting a transaction. Returns gas tiers and USD cost estimates in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
chain | string | no | Blockchain network (default: base) |
Returns
slow-- gas price in gwei for slow confirmation (~5 min)standard-- gas price in gwei for standard confirmation (~2 min)fast-- gas price in gwei for fast confirmation (~30s)instant-- gas price in gwei for instant confirmationtransferCostUsd-- estimated USD cost for a simple ETH transferswapCostUsd-- estimated USD cost for a token swapcongestion-- network congestion level (low/medium/high)
Example response:
{"slow":0.008,"standard":0.012,"fast":0.018,"instant":0.025,"transferCostUsd":0.02,"swapCostUsd":0.05,"congestion":"low","chain":"base"}When to use: submitting any on-chain transaction to pick the right gas tier. Essential for timing transactions and avoiding high-gas periods.
Not for: swap quotes (use dex_get_swap_quote), wallet balance (use wallet_get_portfolio).
gas_get_current_price
Use this when you need current gas prices before submitting a transaction. Returns gas tiers and USD cost estimates in JSON. POST variant of gas_get_current_price -- same params passed as JSON body instead of query string.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
chain | string | no | Blockchain network (default: base) |
Returns
slow-- gas price in gwei for slow confirmation (~5 min)standard-- gas price in gwei for standard confirmation (~2 min)fast-- gas price in gwei for fast confirmation (~30s)instant-- gas price in gwei for instant confirmationtransferCostUsd-- estimated USD cost for a simple ETH transferswapCostUsd-- estimated USD cost for a token swapcongestion-- network congestion level (low/medium/high)
Example response:
{"slow":0.008,"standard":0.012,"fast":0.018,"instant":0.025,"transferCostUsd":0.02,"swapCostUsd":0.05,"congestion":"low","chain":"base"}When to use: submitting any on-chain transaction to pick the right gas tier. Essential for timing transactions and avoiding high-gas periods.
Not for: swap quotes (use dex_get_swap_quote), wallet balance (use wallet_get_portfolio).
Example agent prompts
- "Current gas prices before submitting a transaction"
- "Current gas prices before submitting a transaction"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT