x402 resource directory

Find paid HTTP operations and MCP tools by URL, host, method or tool name. Compare payment terms across networks and catalogs.

Distinct HTTP URLs
162,662
Distinct MCP URLs
43
Catalog observations
263,972
URLs with a 402 in 7 days
1,481
Network identifiers
181

These results as JSON

GET https://138-197-15-135.sslip.io/v1/company/enrich · 1 observation
Enrich a company domain: name, title, description, social profiles (LinkedIn, X, GitHub, etc.), contact emails and phones found on the homepage, language, tech hints (frameworks, analytics), mail provider from MX records, and key pages (about, pricing, careers, contact). Deterministic, no LLM, public data only.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/contract/abi · 1 observation
Whether a contract on Base, Ethereum, Arbitrum or Optimism is source-verified (Sourcify), its name, compiler, full ABI, function and event signatures, and its EIP-1967 proxy implementation (also looked up). Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0040 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/dex/quote · 1 observation
Best Uniswap v3 single-hop quote for swapping amountIn of tokenIn to tokenOut on Base, Ethereum, Arbitrum or Optimism, checking all fee tiers (0.01/0.05/0.3/1%). Returns amountOut, effective price, best fee tier, gas estimate. Tokens: ETH, USDC, USDT or 0x address. Read-only quote; no swap is executed. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0045 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/evm/block · 1 observation
Block number, timestamp, hash, tx count, gas used/limit and base fee for the latest (or given) block on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/evm/blocks · 1 observation
Batch block lookup: latest block plus up to 10 block numbers (comma-separated) on Base, Ethereum, Arbitrum or Optimism in one paid call. Same fields as /v1/evm/block (number, hash, timestamp, tx count, gas, base fee). Costs less than 10 single calls. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/evm/gas · 1 observation
Current gas price, base fee, suggested priority fee and EIP-1559 maxFee for Base, Ethereum, Arbitrum or Optimism, plus a 21000-gas transfer cost in native units. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/github/repo · 1 observation
GitHub repository snapshot: stars, forks, open issues, watchers, language, license, topics, created/pushed dates, default branch, latest release (tag, date) and archived flag. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/markdown · 1 observation
Fetch any public web page and get clean Markdown (title, headings, links, text). Deterministic, no LLM, fast. GET ?url=https://...

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0085 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/name/resolve · 1 observation
Resolve an ENS name (vitalik.eth) or Basename (jesse.base.eth) to an address, or an address to its verified primary ENS name. On-chain, deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0045 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/nft/metadata · 1 observation
tokenURI and resolved JSON metadata (name, description, image, attributes) for an ERC-721 or ERC-1155 token on Base, Ethereum, Arbitrum or Optimism. IPFS/Arweave resolved. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0070 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/nft/owner · 1 observation
Current owner of an ERC-721 token (ownerOf) on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0025 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/social/hn · 1 observation
Search Hacker News stories or comments by keyword, newest or most relevant first, with points, comment count, author, URL and HN link. Good for tracking mentions of a product, company or topic. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/solana/balance · 1 observation
Native SOL balance (lamports and SOL) for any Solana address. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0025 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/solana/wallet-profile · 1 observation
One-call Solana wallet profile: SOL and SPL/Token-2022 holdings with USD values (top 25 by value), total USD, recent activity (last 100 signatures: count, failure rate, first/last seen, tx per day), programs used with labels (Jupiter, Raydium, Orca, Pump.fun, Meteora, Drift...), top counterparties from the last 15 transactions, and a simple wallet type (bot-like / trader / holder / inactive). Free public data, deterministic, no LLM. Cheaper than comparable Solana wallet-intel APIs.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0120 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/token/price · 1 observation
Current USD price for a token contract on Base, Ethereum, Arbitrum or Optimism (or the chain's native ETH if no address), with symbol, decimals and confidence. Aggregated from public DeFi price feeds. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0035 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/token/safety · 1 observation
Scam check for an ERC20 on Base, Ethereum, Arbitrum or Optimism: honeypot, buy/sell tax, mintable, owner can change balances, proxy, blacklist, open source, holder concentration, LP lock. Returns a 0-100 risk score, a verdict (low/medium/high) and the flags behind it. Use before buying or accepting a token. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0090 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/token/transfers · 1 observation
Recent ERC20 Transfer events (decoded: from, to, amount with decimals, symbol, tx hash, block) for a token contract, a wallet, or both, over the last ~2,000 blocks on Base, Arbitrum or Optimism (~500 on Ethereum). Up to 50 newest. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0045 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/wallet/portfolio · 1 observation
One call: ETH, WETH, USDC and USDT balances for an address across Base, Ethereum, Arbitrum and Optimism, each with a USD value, plus the total USD value and per-chain subtotals. Deterministic, no LLM.

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0080 (USDC)
    agentic.market · seen
GET https://138-197-15-135.sslip.io/v1/x402/seller-scores · 1 observation
Hearth's seller ranking data, per category (search, scrape, llm, image, enrich, onchain, price, social, weather, geo, audio, security) or free-text q: blended rank score with its parts, 30d paying usage, Hearth's own purchase outcomes (valid-response rate, latency), nightly liveness/payTo probe, and public reputation (402index reliability/uptime, vet402 verdict and settlement record, x402-trust grade), plus drop reasons. $0.005. Free sample: /v1/free/seller-scores?category=search

Hearth: x402 Pay-Safety & Discovery profile

  • Base · exact
    $0.0050 (USDC)
    agentic.market · seen
GET https://139-59-68-105.sslip.io/api/v1/x402/basis · 1 observation
Live Binance/CoinDCX spot quotes, computed USDT/USDC basis and Base pool mid-prices (raw quotes, not trading signals)

Velox Crypto Market Data profile

  • Base · exact
    $0.0300 (USDC)
    agentic.market · seen
GET https://139-59-68-105.sslip.io/api/v1/x402/kalman · 1 observation
Live Kalman-filtered price velocity and direction for BTC, ETH and SOL (model output, not trading advice)

Velox Crypto Market Data profile

  • Base · exact
    $0.0300 (USDC)
    agentic.market · seen
GET https://139-59-68-105.sslip.io/api/v1/x402/regime · 1 observation
Live 3-state Gaussian HMM market regime and volatility sizing scalar for BTC, ETH and SOL (model output, not trading advice)

Velox Crypto Market Data profile

  • Base · exact
    $0.0300 (USDC)
    agentic.market · seen
GET https://143-198-132-236.sslip.io/agent/store-check · 2 observations
Is this online store real and active? Checks a store URL (Shopify, Etsy, WooCommerce, Squarespace, Wix, BigCommerce or any site): platform, live products, price range, newest product date, contact and policy pages, and a verdict (active / looks inactive / not a store / unreachable).

Hero HQ Agent Store profile

  • Base · exact
    $0.0500 (USDC)
    Recipient 0x0441891face7e79912792fc725640f825f370f6d
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0500 (USDC)
    agentic.market · seen
POST https://14ae9e246c.na113.preview.abacusai.app/verdict · 1 observation
Token security verdict for an ERC-20 on Base or Ethereum: risk score (0-100), flags, liquidity, holder concentration, honeypot indicators, top holders and a short summary.

14Ae9E246C profile

  • Base · exact
    $0.0200 (USDC)
    Recipient 0x830a0B72d0025e049ecF6C767B85Bec35e663365
    PayAI · seen

Counts describe directory coverage, including testnets. Each resource groups the same URL, HTTP method or MCP tool across sources. A catalog sighting records published terms. A live 402 records the endpoint’s reply to an unpaid request.