Onchain & crypto

Pre-send EVM address checks: free pre-check, $0.01 check, $0.05 deep scan. x402: payment is auth.

On-chain honeypot/rug scanner, market data, and launch tools for Robinhood Chain (EVM 4663).

Free read-only Base Mainnet transaction Preflight and Verification; no signing or custody.

List every token FortiSwap routes on the X1 blockchain (XDEX + Degen launchpad): mint, symbol, name, decimals, logo, USD price, 24h volume, TVL, trust tier, liquidity, and the isSpam / isVerified / riskReasons safety flags. Call this first to resolve a symbol to a mint before quoting or building an X1 swap.

+3 more from FortiSwap

Trace an HTTP redirect chain to its final destination without downloading page bodies. Returns every hop (URL + status), the final URL, and safety warnings — link-safety grounding for agents before they visit or cite a URL. Clean JSON.

SSL/TLS certificate check: expiry, issuer, SANs, chain validity, hostname match, negotiated protocol/cipher, and weak-algo warnings for a public HTTPS host. Clean JSON.

Crypto fear & greed index (current + previous reading). JSON.

Settlement canary: returns a timestamped pong JSON after USDC micropayment. Use to verify x402 client + wallet + facilitator end-to-end.

Is this token safe to buy? Honeypot check -- can the token be bought but not sold? Fast honeypot detection for ERC-20 tokens.

+2 more from hexscan.xyz

Entry point to the x402 Carbon Retirement API on Base. Returns every endpoint you need plus a live snapshot of the top 3 carbon classes and marketplace listings by liquidity. Discover, quote and certificate are free. Retiring is paid: each retirement costs the credit price plus a fee, sent from your own wallet (prepare/retire) or relayed from a signed USDC authorization (prepare-auth + POST actions/retire). Full spec at /openapi.json.

Latest observed weather signal for one city — a single-signal SPOT snapshot (like a market-data quote). Flat $0.01, payable by a STOCK x402 client (no binding nonce). Never returns history or more than one signal. Uncharged on unknown-city / no-data-yet.

Current gas prices on Ethereum mainnet and Base — base fee, priority fee, and EIP-1559 estimates in Gwei as JSON. No API key required. Use for: gas fee check before transacting, transaction cost estimation, L1 vs L2 fee comparison, onchain timing. $0.001 USDC per call.

+10 more from TickersFeed

Signed attestation (ECDSA plus a post-quantum ML-DSA-65 companion) of on-chain wallet conditions across 37 chains: token balance, NFT ownership, EAS, Farcaster, view calls, ratio rules, account code (plain key, EIP-7702 delegation, or contract), and agent standing (ERC-8004 registration, ERC-7710 delegation validity). A verifiable boolean, never raw balances or code. Up to 10 conditions per pay-per-call request. Pay in USDC on Base, Polygon, Arbitrum, Arc, or Solana.

+2 more from InsumerAPI

Sentiment score (-1 bearish to +1 bullish) and label for arbitrary text, or for a crypto asset based on its recent price action, via Claude Haiku. For agents gauging market mood or scoring news, social posts, or free text.

+1 more from Stelar Digital

Crypto Fear & Greed index — the current market-sentiment score (0-100) and its label (Extreme Fear … Extreme Greed), as a clean snake_case envelope.

+2 more from Crypto Perp Funding & Sentiment

The current chain tip (latest block height) via eth_blockNumber, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The freshness read settlement, indexing and trading agents poll to know where the chain is. Live public RPC; one paid call.

Generate cryptographically secure random float(s) between 0 and 1

+1 more from rng.sociologic.ai

x402 payability check: reachable + well-formed 402 + (Solana) destination-ATA existence

Get live EVM gas pricing with EIP-1559 breakdown and USD cost estimates

+1 more from api2ls.com

Current gas conditions on Base, read live from a public node: gas price, base fee of the latest block, suggested priority fee, latest block number and timestamp. No parameters. No third-party API, no cache.

+25 more from oraclepost.higgsfield.app

Current price, market cap, and 24h change for a single cryptocurrency by symbol or name (CoinGecko).

+1 more from currency-api-production-4a8d.up.railway.app

Deterministic pre-sign risk screening for unsigned Base EVM transactions. Detects ERC20 transfers, token approvals, unlimited approvals, setApprovalForAll, malformed calldata and OFAC SDN and configured address matches. Returns machine-readable ALLOW, REVIEW or BLOCK.

WalletTriage — real-time wallet risk check: dangerous ERC20 approvals cross-referenced with a live exploit threat feed. Returns risk_score (0-100), risk_level and actionable findings.

Batch historical token prices by DefiLlama — prices for many coins at many timestamps in one call (coins is a JSON map).

+27 more from DefiLlama DeFi TVL & Yields

Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against verified ABIs, resolves proxies, classifies approvals, and checks a payment authorization against the quote it claims to pay: recipient, amount, asset, chain, freshness, and nonce replay. Returns unknown rather than guessing when a selector is ambiguous. Not a guarantee that a transaction is safe or profitable.

Did this Solana payment really arrive? Verifies that a finalized mainnet transaction credited the exact amount of a token to the payee. Signed VERIFIED, REFUTED, UNCONFIRMED or NOT_FOUND with a per field breakdown. $0.01 in USDC on Base. Free preview: GET /settle/preview

Verifiable RNG — cryptographically-random integer(s) signed by the treasury key. Drop-in VRF for game studios. $0.001 USDC.

Check the status of a Base transaction: success/reverted/pending, confirmations, gas used, and explorer link — settlement verification for agents and payment flows.

Short-term price-movement forecast for any crypto token across 7 time horizons.

VIN decode (x402; 402 first, $0.005, Base then Solana)