Onchain & crypto

Read-only EVM contract call (eth_call) with decoded revert reason and optional gas estimate — simulate before you sign

+1 more from agent.connskill.com

Checks whether a token contract address is real, matches its claimed symbol, and whether its supply figures match an independent source (CoinGecko) — before trading, coding, or reporting against it. Catches hallucinated/wrong addresses, address-poisoning impersonation, and tokenomics hallucination.

GROUNDTRUTH creator counts: launches, rugged, died, active, survived, graduated, and the observed-only baseline the known_bad line is drawn from. Live fields from the mint feed every 5 s: last_mint_live, launched_live, bonded_live, mints_since_asof; ticker_asof = the newest mint seen. No mints_since_asof = not live.

Pre-flight check before a swap or transfer: ERC-20 allowance, balance, decimals and symbol in one call, read live from the chain at the latest block. Pass an amount and get a straight would_succeed verdict with the blocking reason and the action needed. Base, Ethereum, Arbitrum, Optimism, Polygon. A missing approval burns the gas of a failed transaction - this call costs a fraction of that.

TraceFast live Ethereum data: three different questions about when an address was active, each answered separately — when it was first mentioned anywhere on chain; when its own account state last changed and how many times it changed; and the newest block at which it took part in anything (a top-level transaction, a token transfer, an emitted log, a value-bearing call), with the sources that answer was… Path: address. Docs: https://docs.tracefast.xyz/api/address-activity.md

+41 more from TraceFast

Check any wallet balance across 5 EVM chains. Returns native or ERC-20 balance with threshold check, block height, and on-chain receipt. Supports Base, Ethereum, Arbitrum, Optimism, and Polygon.

DDG agent-payable service request

+17 more from DDG Agent-Payable Services

Should your agent pay this endpoint, seller or wallet? Verdict (ok_to_pay / caution / dont_pay) from live payment terms, its x402 Bazaar listing and paying wallets, payment-address match, real-USDC check, price vs. similar tools, and seller domain age.

Exact token count for text using OpenAI tokenizers. Body: {text, encoding?} where encoding is cl100k_base or o200k_base (default). Returns tokens and char_count. Use to budget prompts and context windows.

Every DefiLlama protocol with current TVL, filtered server-side (the raw index is 8.5MB). Query: chain, category (Lending, Dexes, ...), min_tvl (USD), sort (tvl|change_1d|change_7d), limit (1-100). Each: name, slug, chain, category, tvl_usd, change_1d, change_7d, mcap. Use the slug with /llama/tvl for a live single-number poll.

DeFi yield opportunities across chains and protocols (DefiLlama data): pool, project, chain, TVL, and APY, ranked by APY. Query: chain (e.g. Ethereum, Base), project, min_tvl (USD, default 10000000), limit (1-100, default 20). Use to screen for yield, monitor rates, and route capital.

Total DeFi TVL for every chain DefiLlama tracks, ranked. Query: limit (1-500). Each: name, tvl_usd, token.

Every tracked stablecoin with circulating supply (USD), peg type, peg mechanism, and current price. Ranked by circulating. Query: limit (1-200).

Live perpetual-futures funding rates from Hyperliquid: per-coin funding rate, mark price, and open interest. Query: coins (optional comma list, e.g. BTC,ETH,SOL), limit (default 20, ranked by absolute funding). Use to monitor funding, hunt basis trades, and time entries. Real-time, keyless.

Cryptographically-secure randomness with a receipt. GET ?bytes= returns hex (1-256 bytes); add ?min=&max= for a uniform integer in an inclusive range. Each response carries a request_id and timestamp — unbiased entropy an agent can cite to a counterparty, not a seeded PRNG. Need provable fairness over time? /rand/commit does commit-reveal (commitment now, value later).

Current spot price for crypto trading pairs. Input: pair — a single pair (BTC-USD) or up to 10 comma-separated pairs (BTC-USD,ETH-USD,SOL-USD) returned in ONE call for the same price — poll a whole portfolio per tick. Returns amount and currency per pair. Real-time from Coinbase.

Is this Base token a honeypot? Can you sell it? A real buy and full sell simulated in one block on Uniswap or Aerodrome (Virtuals tokens through their VIRTUAL pool), with the round-trip cost. Can you get out of this Base token, and what does it cost? Pass a Base token address: we find its deepest pool we can simulate (Uniswap v2, v3 or v4 against WETH or ETH, hooks included; Virtuals agent tokens through their VIRTUAL pool; Aerodrome basic and Slipstream pools against WETH, VIRTUAL or USDC),…

Wire-In Lookup — per-entity merchant-seat verdict. Pass ?ua=<counterparty-UA>; get ONE signed row: score (0.0-1.0 payment-reliability observed at this seat), confidence, verdict (settled | attempted_payment | probe_only | low_signal | unknown), observed counts, Ed25519 attestation. $0.01 USDC/entity on Base or Solana. Fold the score into your own counterparty model — wire it into your scoring loop. Wallet lookup (?wallet=) is v2.

+2 more from underground.substratesymposium.com

Every token launch recorded by the Arc launchpad Portal, kept so you do not need to run an archive node. Public Arc JSON-RPC endpoints cap each getLogs call at 10,000 blocks and the official one rate-limits bursts (both measured 29 Sep), so rebuilding this history yourself takes hundreds of calls - that is the work this saves. This is NOT the only copy: archive nodes, explorers, indexers and Circle all hold the full history. It is a convenience, not a monopoly.

Exit analysis: sell $N of a token and see what you actually receive, the slippage, and the largest position that exits under 5%. Constant-product maths on live pool reserves, not a safety grade.

Single token detail (price, holders, liquidity, change windows).

Check stablecoin supply and flows. Query by chain (stablecoin supply on Ethereum, Base, etc.), by stablecoin (USDC market cap and circulation), or get the overall market summary. Data from DeFi Llama.

+9 more from api.strale.io

OHLC candles for a token, built from indexed trades. Pass ?tf=1m, 5m, 15m, 1h, 4h or 1d (default 5m) and ?limit=N up to 1000 (default 200); ?before=<unix seconds> pages backwards. Timestamps are unix seconds. The description used to name the timeframes without naming the PARAMETER, so a paying agent had no way to ask for one and silently got 5m whatever it sent (found 2026-09-17).

Recent on-chain trades for one X1 token, newest first: timestamp, side, the amounts and mints on both legs, the trader address and the transaction signature, so every row can be checked on chain yourself. Returns up to 200 rows (?limit=N, default 50, hard cap 200) or fewer when the token has traded less than that. Read from our own indexed trade history, not from a third-party API.

Wallet profile for an X1 address: every token it traded with XNT spent and received, realized and unrealized PnL per token and in total, top winners and losers, and a win rate. The win rate counts closed profit only, on positions of at least 0.1 XNT; positions still held at a loss are counted separately (heldAtLoss), so read it beside totalPnlXnt, never alone.

Token verdict for any Base token from a real simulated buy and sell: BASED, MID, COOKED or RADIOACTIVE (honeypot), or UNTESTED when no pool can be simulated; Virtuals agent tokens are tested through their VIRTUAL pool, on Uniswap or Aerodrome. With round-trip cost and a one-liner.

Horizon Pulse — real-time crypto market data + momentum signals (BTC/ETH/SOL) tuned for AI agents

Live order book for a crypto pair (e.g. BTC-USD). Default level=1: best bid/ask with sizes, mid price, spread, and spread_bps. level=2 adds top-of-book depth (depth param, 1-50 price levels per side, default 20). Real-time from Coinbase. Use for trading signals, spread monitoring, liquidity checks, and execution decisions.

Live USD spot prices for crypto assets via CoinGecko simple price API

+11 more from api.zerion.io