{
  "markdown": "# Gas Oracle API\n\n[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://gas-oracle.api.klymax402.com/mcp)\n[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)\n\nLive gas prices with gwei tiers, USD cost estimates, and congestion level. Time your transactions perfectly. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.\n\nPart of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.\n\n## Quickstart -- MCP\n\nAdd to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):\n\n```json\n{\n  \"mcpServers\": {\n    \"gas-oracle\": {\n      \"url\": \"https://gas-oracle.api.klymax402.com/mcp\"\n    }\n  }\n}\n```\n\n## Quickstart -- HTTP (x402)\n\n```bash\ncurl \"https://gas-oracle.api.klymax402.com/api/price\"\n# -> 402 Payment Required, with an x402 payment challenge in the response body\n```\n\nAny x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.\n\n## Tools\n\n| Tool | Method | Path | Price | Description |\n|---|---|---|---|---|\n| `gas_get_current_price` | GET | `/api/price` | $0.003 | Get current gas prices with slow/standard/fast/instant tiers |\n| `gas_get_current_price` | POST | `/api/price` | $0.003 | Get current gas prices with slow/standard/fast/instant tiers (POST variant) |\n\n### `gas_get_current_price`\n\nUse this when you need current gas prices before submitting a transaction. Returns gas tiers and USD cost estimates in JSON.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `chain` | string | no | Blockchain network (default: base) |\n\n**Returns**\n\n- `slow` -- gas price in gwei for slow confirmation (~5 min)\n- `standard` -- gas price in gwei for standard confirmation (~2 min)\n- `fast` -- gas price in gwei for fast confirmation (~30s)\n- `instant` -- gas price in gwei for instant confirmation\n- `transferCostUsd` -- estimated USD cost for a simple ETH transfer\n- `swapCostUsd` -- estimated USD cost for a token swap\n- `congestion` -- network congestion level (low/medium/high)\n\nExample response:\n\n```json\n{\"slow\":0.008,\"standard\":0.012,\"fast\":0.018,\"instant\":0.025,\"transferCostUsd\":0.02,\"swapCostUsd\":0.05,\"congestion\":\"low\",\"chain\":\"base\"}\n```\n\n**When to use**: submitting any on-chain transaction to pick the right gas tier. Essential for timing transactions and avoiding high-gas periods.\n\n**Not for**: swap quotes (use `dex_get_swap_quote`), wallet balance (use `wallet_get_portfolio`).\n\n### `gas_get_current_price`\n\nUse 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.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `chain` | string | no | Blockchain network (default: base) |\n\n**Returns**\n\n- `slow` -- gas price in gwei for slow confirmation (~5 min)\n- `standard` -- gas price in gwei for standard confirmation (~2 min)\n- `fast` -- gas price in gwei for fast confirmation (~30s)\n- `instant` -- gas price in gwei for instant confirmation\n- `transferCostUsd` -- estimated USD cost for a simple ETH transfer\n- `swapCostUsd` -- estimated USD cost for a token swap\n- `congestion` -- network congestion level (low/medium/high)\n\nExample response:\n\n```json\n{\"slow\":0.008,\"standard\":0.012,\"fast\":0.018,\"instant\":0.025,\"transferCostUsd\":0.02,\"swapCostUsd\":0.05,\"congestion\":\"low\",\"chain\":\"base\"}\n```\n\n**When to use**: submitting any on-chain transaction to pick the right gas tier. Essential for timing transactions and avoiding high-gas periods.\n\n**Not for**: swap quotes (use `dex_get_swap_quote`), wallet balance (use `wallet_get_portfolio`).\n\n## Example agent prompts\n\n- \"Current gas prices before submitting a transaction\"\n- \"Current gas prices before submitting a transaction\"\n\n## Payment\n\n- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key\n- Network: Base L2 (`eip155:8453`)\n- Asset: USDC\n- Facilitator: Coinbase CDP (primary), PayAI (fallback)\n- Also reachable via [ATXP](https://atxp.ai) (OAuth-wrapped x402, RFC 9728 protected-resource metadata)\n\n## Part of klymax402\n\n100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.\n\n- Catalog: https://klymax402.com/llms.txt\n- Full API reference: https://klymax402.com/llms-full.txt\n- Live stats: https://klymax402.com/stats\n\n## License\n\nMIT\n",
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  "sha": "acbea3ffed9f5345601ee93d788079e99f650a79939fc4636b798fd8c9370609",
  "repo_slug": "br0ski777/gas-oracle-x402",
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  "api": "https://agentalog.com/api/listings/mcp_io_github_br0ski777_gas_oracle_1bc36641/readme"
}