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Compare realtime and batch API cost for a workload with your discount fraction, and the money saved by waiting.

Number of beads for a strand of a given finished length from bead size and spacing, with finished length and total weight.

Live x402 conformance pre-flight check: pass ?url=<x402 endpoint>, get a structured PASS/WARN/FAIL verdict on its 402 challenge before you trust it with a real payment.

Ask anything about crypto: real-time crypto insights, token analytics, trend detection and market intelligence.

Crypto Fear & Greed index: current value and classification plus 7-day history. Always-on, self-healing, verified onchain settlement. Source: Alternative.me.

Filter DefiLlama yield pools using red, activo or protocolo; optional pool_id requests bounded history. Returns up to 15 selected pools, APY/TVL fields, coverage and source-specific capture metadata. Class-based outlier and divergence rules are descriptive, with match gaps disclosed. Snapshot timing, pool comparability and investment outcomes are not independently established.

Check a crypto address (BTC, ETH/EVM, TRON, USDT, XMR, LTC...) for an exact match with OFAC SDN digital currency addresses; returns the designated entity, currency and programs.

Is this address safe to pay? Sanctions lists, scam labels, EIP-7702 sweeper wallets, address-poisoning look-alikes and where the wallet's first funds came from. A signed allow, caution or block, an action and the reasons.

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

CVE fact check, deterministic. Answers "is CVE-XXXX-NNNN real", "is it exploited in the wild", "what version fixes it", "how severe is it". Joins the NVD record (CVSS score, vector, dates), the CISA KEV catalog (actively-exploited flag, remediation due date, ransomware use), and OSV (affected packages + fixed versions per ecosystem). No LLM. Distinguishes "not a known CVE" from "registry unreachab

Chinese temple fortune slip divination (求签, 签文, 抽签). Draws a numbered qianzi slip from traditional Chinese temple oracles (Guanyin 观音, Guan Di 关帝, Mazu 妈祖), returns slip number, level (上签, 中签, 下签), classical poem, and interpretation. For Chinese folk oracle, temple lottery, divination, fortune queries. Accepts payment on Base or Solana — either network works.

Observed token mints, paginated

Japan Stablecoin Payment Monitor: weekly change feed for stablecoin payment services in Japan — new launches, pilots, partnerships, fee changes, supported assets and chains, and closures. Each event is dated, categorized and tied to an official source URL. Pass changedSince=YYYY-MM-DD (your last run date) to fetch only new events; an empty changes list explicitly means no change. Without changedSi

Blockchain Data gas: Current gas price, base fee and priority-fee percentiles in gwei for one or all 7 EVM chains (eth_feeHistory, 5 blocks), or Bitcoin sat/vB fee estimates.

AgentCheck: independent report on an x402 seller before you pay it. Are its buyers real (repeat wallets on their own money) or funded by the seller itself, measured from 30 days of on-chain payments, plus results of our own paid test purchases where we have them. Query: ?domain=<seller-domain>. GET /sellers (free) lists covered domains.

Generate cryptographic random bytes

Open interest of a coin's perpetual per venue (Binance, Bybit, OKX, Hyperliquid) in contracts and USD with market share, 24h change where history exists (Binance, Bybit), and the Binance long/short account ratio.

Price of ONE token: on-chain USD spot price for a single ERC-20 on Base, from the deepest Uniswap v3 pool vs USDC/WETH (slot0), with the pool/fee tier used and its USD depth. No off-chain feed; thin pools are easy to manipulate. To price MANY tokens at once, use multi-token-price instead (one cheaper call).

Pre-flight a Base payment destination before you send. Verifies the EIP-55 checksum, measures distance from an address you expect — catching a mistyped digit and the shared prefix-and-suffix shape of a ground look-alike — flags the zero address, burn sinks and precompiles, refuses a token offered as its own payee, and reports whether the destination can receive the asset. Returns unknown rather th

Decide whether to grant an ERC-20, NFT or Permit2 allowance before signing it. Send owner, token, spender and amount, or the unsigned approve, setApprovalForAll or Permit2 calldata. Returns allow, warn, block or unknown with the allowance already on chain, the requested scope and the rule behind it, whether this raises or lowers exposure, and whether the spender is a contract, upgradeable or denyl

Current Base network gas price, read live from a public Base RPC node (eth_gasPrice) and returned in both wei and gwei with the snapshot block it was read at.

Quick status of a Mexican RFC in the SAT 69-B list (simulated operations: presumed, definitive, disproved, favorable ruling) and the article 69 lists (CSD revoked, firm debts, not located), with the version and date of each source and when its next publication is expected. Optional 'since' returns what changed after that date. No certificate: use company/verify for a certificate with folio.

Call before your agent acts on ETH, BTC or USDC on Base: are the Chainlink feeds fresh, and is any of the three in caution or risk-off? One normal/caution/risk-off verdict per asset from feed age, price moves and a USDC depeg check. Cheap enough to poll before every trade.

Cross-venue perpetual funding rates (OKX, Kraken Futures, dYdX) for any major token. Per-venue annualized rates plus the cross-venue spread in percentage points — a ready-to-use funding arbitrage signal. Clean JSON for trading and research agents.

Chainlink Oracle Price

LLM chat completion with no API key or signup (fast open model, meta-llama/llama-3.3-70b-instruct). OpenAI-compatible: set your SDK base URL to https://keyless.run/fast/v1. Flat $0.002 per call, up to 1500 output tokens. Charged only on success.

Before your agent negotiates or shares data with another agent, make both prove they qualify. Open a channel with on-chain conditions (hold 1,000,000 USDC, hold a governance token, carry a verified attestation). Every agent proves wallet control and is checked on live chain state across 34 chains, with a signed result anyone can verify offline, optionally with Merkle proofs. Re-check on demand; wh

Timestamp and notarize any file or data by its SHA-256 hash: blockchain proof of existence and document integrity, anchored on Polygon in minutes and attested on Bitcoin (OpenTimestamps); blockchain notarization, not a notary act. Returns proof_id, certificate, proof.json and evidence ZIP, verifiable without Sellat. Use when you must prove that exact data existed by now and is intact.

Agent guardrail decision engine. Call once before every agent action; returns a single decision — proceed, slow down (with a reason and wait time), or stop — based on cost budget, chain depth, step cap and retry budget, and request volume pressure. Policy thresholds are configured separately via /policy; this endpoint only reports the decision for a single action.

Asks every known facilitator what it supports and measures how long that answer takes. Reachability, supported chains, supported assets, supported schemes and the current response time are measured live on every call. Limits, and they are the important part: error rate over 24 hours, uptime over 7 days and latency percentiles CANNOT be delivered. They require a series of own measurements every few