R
rezearcher/x402-data-api
Agent-native x402 pay-per-call data & security APIs on Base (crypto, DeFi, on-chain, Polymarket, MCP security…
no SECURITY.md
View on GitHub ↗Link checked 2026-11-12 · HTTP 200 · opens the vendor's own site
Install & config
Client config (built from the install command this repo gives)
{
"mcpServers": {
"rezearcher-x402-data-api": {
"command": "npx",
"args": ["x402-data-api-mcp"]
}
}
}Parsed from the README we fetched on 2026-10-26; we have not executed it.
command/args come from the install command the repository states. When it is ambiguous, the project README wins.
VS Code (.vscode/mcp.json - the key is servers)
{
"servers": {
"rezearcher-x402-data-api": {
"command": "npx",
"args": ["x402-data-api-mcp"]
}
}
}Same server, but VS Code keeps it under <code>servers</code>.
Claude Code (command line)
claude mcp add --transport stdio rezearcher-x402-data-api -- npx x402-data-api-mcp
Claude Code does not read a config file; add the server with this command.
Key names differ by client: Clients & CLI
- Star count
- 0 ★ · rezearcher/x402-data-api · read from the GitHub search API · (checked 2026-11-13 20:00:50)
- Source
- read directly from its GitHub page · type: open-source project
- Harvest history
- first seen 2026-10-21 · last seen 2026-11-14 · seen 28× · listed by 2 sources
- Score
- score 203 · 2 sources · repo
- Install
npx x402-data-api-mcp
FAQ (answers come from our records)
How do I install it?
The repository provides this install command:
npx x402-data-api-mcp. It comes from the repository itself; we cannot guarantee it runs as-is in your client.Who is it for?
We filed it under these tags: 开源项目. The tags come from the entry itself, not a taxonomy we imposed.
Who maintains it?
repository
rezearcher/x402-data-api；first catalogued 2026-10-21；last seen 2026-11-14。There is no official certification or quality rating here — we record sources and dates only.# Grey Ridge Signals — Agent-Native x402 Data & Security APIs
以下摘录自该仓库的 README（片段） · 在 GitHub 读完整 README →
Pay-per-call crypto, DeFi, prediction-market, and on-chain data for AI agents — plus MCP
security scanning — over the x402 payment protocol on Base mainnet.
No account, no API key, no subscription. An agent pays inline in USDC (from $0.001/call) and
gets the data back in the same request. Every data endpoint has a free preview so an agent
can taste the payload before paying.
Base URL: https://x402-data-api.sigrunner.workers.dev
MCP endpoint (streamable-http): https://x402-data-api.sigrunner.workers.dev/mcp
Canonical domain: https://x402-data-api.sigrunner.workers.dev (same API)
Discovery: /.well-known/x402 · /openapi.json · /llms.txt
Network: Base mainnet (eip155:8453), USDC. Settles via the non-custodial xpay facilitator — no Coinbase/CDP account needed. Also listed on the CDP x402 Bazaar.
## Two flagships — what agents actually pay for
1. MCP server security scan (/scan/mcp, $0.05) — a prompt-injection / tool-poisoning audit of an MCP server's tools (OWASP LLM01/LLM08). Zero-egress: for private/OAuth-gated servers you POST only the tools/list JSON — nothing else leaves your side. There is no free equivalent for this (unlike token-safety, where free multi-chain scanners exist). Free preview: POST /scan/mcp/preview. CI gate (on the GitHub Marketplace): uses: rezearcher/greyridge-x402-tools@v0.3.2.
2. Pre-trade decision gate (/gate/swap, $0.008 · /chain/token-report, $0.01) — a decision (GO/HOLD/BLOCK, SAFE/CAUTION/AVOID) sized to your trade, not raw flags your agent has to interpret. Base-native; if you trade other chains, keep your multi-chain scanner and use this on Base.
Everything below is the full catalog (crypto/DeFi data, on-chain reads, LLM, enrichment). Measured reliability at /status (not an SLA).
## Endpoints
### Crypto & DeFi data
| Endpoint | Price | Returns |
| GET /crypto/prices?coins=bitcoin,ethereum,solana | $0.001 | Spot token prices (DefiLlama), keyless. Up to 25 CoinGecko ids. |
| GET /crypto/funding?limit=20 | $0.001 | Cross-venue perp funding rates (Hyperliquid + OKX, graceful fallback) with the funding spread + best long/short venue — the arb signal, not just a single-venue list. |
| GET /defi/yields?limit=20&project=&chain=&stable= | $0.001 | Top DeFi lending/LP yields (DefiLlama) with APY breakdown, 7d/30d APY trend, IL risk, and DefiLlama's stability forecast — decision-grade, not a raw list. |
| GET /pm/markets?query=&limit=20 | $0.005 | Live Polymarket prediction markets: question, outcomes, prices, volume, liquidity, end date. |
### Base on-chain (JSON-RPC read primitives)
Base-native, multi-provider RPC with automatic failover (never fails a paid call on one provider's rate limit).
| Endpoint | Price | Returns |
| GET /chain/block-number | $0.001 | Current Base block number |
| GET /chain/gas-price | $0.001 | Current gas price (wei + gwei) |
| GET /chain/balance?address= | $0.001 | Native ETH balance |
| GET /chain/token-balance?address=&token= | $0.001 | ERC-20 token balance |
| GET /chain/tx?hash= | $0.001 | Transaction details |
| GET /chain/receipt?hash= | $0.001 | Transaction receipt (status, gas used, logs) |
| GET /chain/code?address= | $0.001 | Contract-code check — is it a contract, and EIP-7702 delegated-EOA detection (iseip7702delegate / delegateaddress) |
security scanning — over the x402 payment protocol on Base mainnet.
No account, no API key, no subscription. An agent pays inline in USDC (from $0.001/call) and
gets the data back in the same request. Every data endpoint has a free preview so an agent
can taste the payload before paying.
Base URL: https://x402-data-api.sigrunner.workers.dev
MCP endpoint (streamable-http): https://x402-data-api.sigrunner.workers.dev/mcp
Canonical domain: https://x402-data-api.sigrunner.workers.dev (same API)
Discovery: /.well-known/x402 · /openapi.json · /llms.txt
Network: Base mainnet (eip155:8453), USDC. Settles via the non-custodial xpay facilitator — no Coinbase/CDP account needed. Also listed on the CDP x402 Bazaar.
## Two flagships — what agents actually pay for
1. MCP server security scan (/scan/mcp, $0.05) — a prompt-injection / tool-poisoning audit of an MCP server's tools (OWASP LLM01/LLM08). Zero-egress: for private/OAuth-gated servers you POST only the tools/list JSON — nothing else leaves your side. There is no free equivalent for this (unlike token-safety, where free multi-chain scanners exist). Free preview: POST /scan/mcp/preview. CI gate (on the GitHub Marketplace): uses: rezearcher/greyridge-x402-tools@v0.3.2.
2. Pre-trade decision gate (/gate/swap, $0.008 · /chain/token-report, $0.01) — a decision (GO/HOLD/BLOCK, SAFE/CAUTION/AVOID) sized to your trade, not raw flags your agent has to interpret. Base-native; if you trade other chains, keep your multi-chain scanner and use this on Base.
Everything below is the full catalog (crypto/DeFi data, on-chain reads, LLM, enrichment). Measured reliability at /status (not an SLA).
## Endpoints
### Crypto & DeFi data
| Endpoint | Price | Returns |
| GET /crypto/prices?coins=bitcoin,ethereum,solana | $0.001 | Spot token prices (DefiLlama), keyless. Up to 25 CoinGecko ids. |
| GET /crypto/funding?limit=20 | $0.001 | Cross-venue perp funding rates (Hyperliquid + OKX, graceful fallback) with the funding spread + best long/short venue — the arb signal, not just a single-venue list. |
| GET /defi/yields?limit=20&project=&chain=&stable= | $0.001 | Top DeFi lending/LP yields (DefiLlama) with APY breakdown, 7d/30d APY trend, IL risk, and DefiLlama's stability forecast — decision-grade, not a raw list. |
| GET /pm/markets?query=&limit=20 | $0.005 | Live Polymarket prediction markets: question, outcomes, prices, volume, liquidity, end date. |
### Base on-chain (JSON-RPC read primitives)
Base-native, multi-provider RPC with automatic failover (never fails a paid call on one provider's rate limit).
| Endpoint | Price | Returns |
| GET /chain/block-number | $0.001 | Current Base block number |
| GET /chain/gas-price | $0.001 | Current gas price (wei + gwei) |
| GET /chain/balance?address= | $0.001 | Native ETH balance |
| GET /chain/token-balance?address=&token= | $0.001 | ERC-20 token balance |
| GET /chain/tx?hash= | $0.001 | Transaction details |
| GET /chain/receipt?hash= | $0.001 | Transaction receipt (status, gas used, logs) |
| GET /chain/code?address= | $0.001 | Contract-code check — is it a contract, and EIP-7702 delegated-EOA detection (iseip7702delegate / delegateaddress) |
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- Source
- github · https://github.com/rezearcher/x402-data-api
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