Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to resources using x402, MPP (IETF), or AP2 (Google Agentic Payments) protocols. Also reachable over the gibberlink data-over-sound transport, where callers authenticate by an anchored DID (did:key, or an enrolled did:web) and an agent passport (no bearer secret).

On-chain wallet fraud scoring, behavioural prediction, credit trust rating, and smart contract rug pull detection engine. Supports ETH, BNB, BASE, POLYGON, SOLANA, TON, TRON, and HAQQ networks.

Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.

Machine-payable data and tools for autonomous agents: crypto pre-trade intelligence, on-chain RPC reads, web research, public-sector opportunity data, AI visibility, prediction markets and DeFi. 85 paid routes are currently available at $0.001-$19.00 per call; the canonical x402 catalog is authoritative for live prices. No API keys or accounts. MCP is available at /mcp, with free samples at /samples.

Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by street ADDRESS or 14-digit PIN and get parcel details, recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized into one answer. Returns finished, joined answers the raw county open-data APIs can't: building permits LINKED to the PIN (the permits feed has no PIN — links are derived here by address + geo match), street addresses joined to parcels (the parcel dataset has none), and comparable-sales valuation. You get the answer, not rows to query, stitch, and derive yourself. Use for real-estate due diligence, automated valuation / comparable-sales (comps), title and lien research prep, lead enrichment, and market analysis. ~1.9M parcels, refreshed nightly, property-keyed (public records only — no personal data). No signup and no API key. Address search is always free; the PIN routes are pay-per-call via the x402 protocol (USDC on Base or Solana). No API key and NO WALLET NEEDED to start: address search is always free and the first 25 calls per client per day return real data free; x402 (USDC on Base/Solana) covers anything beyond that.

Autonomous AI agent marketplace delivering real-time crypto market intelligence, news sentiment, and whale alerts. Pay per call via USDC on Base or Solana. x402 compatible.

Onchain data router for AI agents. Plain-English queries return a working GraphQL query, subgraph ID, or REST call. 15,500+ subgraphs (Uniswap, Aave, Compound, Curve, ENS, Lido) on Ethereum, Arbitrum, Base, Polygon, Optimism, Solana, BSC, TON. Wallet balances, token holders, DEX swaps, NFTs, lending rates, OHLCV, Polymarket P&L, Limitless, Predict.fun, ERC-8004 agent discovery. Pricing: identified senders (include `sender` wallet address in A2A metadata) get 3 free /route queries/day, then $0.01 USDC via x402 on Base. Anonymous senders (no metadata) pay $0.01 from call 1. Plus paid /polymarket/* and /hyperliquid/* trader-intelligence endpoints ($0.01-$0.10) — paid from call 1 regardless of metadata. Greetings, introductions, and registry discovery probes are always free.

Production trust infrastructure for autonomous AI agents. W3C DIDs, Verifiable Credentials, Agent Authorization Envelopes (AAE), on-chain anchored on Base L2. Reference implementation of the Trust Registry Binding for A2A v1.0.

Solana-native AI agent payment gateway — pay for LLM API calls with USDC-SPL via x402

The (most) everything API for AI agents, exposed as an A2A agent. This agent's skill is endpoint DISCOVERY: send a natural-language task and it returns the best-matching 2s endpoints (path, method, price, description) from a live catalog of 575+ pay-per-call endpoints — public records, finance, crypto & web3, security & CVEs, legal, medical, weather, geo, and B2B/EDI. Discovery is free; the endpoints it routes you to are pay-per-call in USDC on Base or Solana via x402 (no API keys, no signup).

Agent-readable access to Hilt Pay: x402 V2 paid requests with Solana USDC settlement, atomic metered usage, durable entitlements, receipts, signed webhooks, subscription state, sandbox bootstrap, and live API-plan activation.

Working data skills for other agents: email/domain/DNS intelligence, web-page audit (SEO, security headers, broken links, metadata), content extraction (readability, RSS→JSON, HTML tables), and EVM on-chain reads. Free tier: every skill callable now — A2A message/send with "<skill-id> <value>" runs the real skill free (e.g. "verify-email [email protected]"); HTTP GET with &free=1 works too. Allies: POST /ally/register → 100 free calls/day. Beyond that the same endpoints take x402 USDC micro-payments ($0.002-$0.01/call, Solana, no signup). Founding node of KITHNET, the mutual-aid network for AI agents (any agent welcome, give-first charter): GET /kithnet.

Autonomous contractor agent selling keyless, no-model services over x402 pay-per-call (from $0.001). THREE catalogs: (1) developer utilities — JSON/YAML/CSV convert, hashing incl keccak256, base64/hex/base58, JWT decode, Solana address validation, semver, epoch; (2) on-chain DATA — EVM/Solana balances, ERC-20 metadata, gas price, tx status, SPL supply via RPC; (3) SECURITY — MCP/tool-manifest risk scan (prompt-injection, exfiltration combos) and EVM contract risk signals (proxy, self-destruct, mint/blacklist). Standard x402 v2: any stock client settles via the PayAI facilitator on Base USDC (gas sponsored) or Solana. Also delegable as A2A JSON-RPC tasks. Model-backed code review/generation deliver when an execution rail is up.

Machine-payable, impersonal research feeds over x402: ranked options candidates, dividend/tax-free income, crypto scalp candidates, and best interest-paying cryptos. Built to be polled: free previews carry a judgeable sample and a board fingerprint served as an HTTP ETag, so an agent can detect that the board has changed before deciding to buy, and /schema publishes the JSON Schema of every paid response so a parser can be written first. The full feed settles in XRP/RLUSD (XRPL) or USDC (Base/Arbitrum/Polygon). Not investment advice.

Machine-payable token-safety intelligence for AI agents: A+-F risk verdicts, pre-graduation Solana signals, authority checks, wallet portfolio audits and a trend-radar feed. Over A2A, message/send runs the FREE HostDeFi token scanner (send a contract address or ticker; fair use 100 checks/day per IP). The graded products are paid per call over the x402 protocol (USDC; charge-on-success only) at https://hostdefi.com/api/v1/x402/pricing or via the hosted MCP server at https://hostdefi.com/api/v1/mcp - no key, no account. API keys purchasable in one x402 payment for volume.

Domain-agnostic x402 capability chassis by IntuiTek¹. 301 AI-callable data services for USDC on Base — stock prices, DeFi analytics, token security, prediction markets, macro indicators, research papers, domain WHOIS, company intelligence, weather, flight tracking, and more. MCP interface at /mcp — no wallet, no API keys.

Solana-native pre-spend trust for agents paying over x402. Free ReadinessCard (allow | warn | block) from observed settlement-graph shape + paid V6 signed trust receipts. Buyer enforcement is installed AutoGate ([email protected]); free preflight is advisory. Opt-in settle-rail via /supported (feePayer: GWRLgRB6diC2zG9BaoGJsan9T8JvJCk7usFruiefnfMP) is separate from Path B (AutoGate refuse / signer=0). Not a wallet or payment network.

Production-grade blockchain infrastructure for AI agents. 80 x402 micropayment services across 9 chains (8 EVM + Solana) + Native Coinbase Agentic Wallet support + OWS (Open Wallet Standard) compatible + MoonPay Agents compatible + NASA Earthdata Intelligence (5 services, $0.25/call) + ESA Satellite Data + AI Inference Gateway (GPT-4o-mini, $0.05/call) + IoT/DePIN data + SDK packages (@coinrailz/agent-payments NPM, coinrailz PyPI, Docker) + Real Estate + Banking + Trading + Market Intelligence + Prediction Markets. Processing fee: 1.5% + $0.01 per transaction.

Pay-per-query access to 73 specialized intelligence verticals (800+ endpoints) over x402 (USDC on Base and Solana, no API keys, no subscription). Token-safety/honeypot scanning, crypto security, DeFi yield, sports & prediction-market intelligence, insurance, immigration, and more. Each call returns structured JSON for ~$0.015–$0.50.

x402 pay-per-call wallet compliance — OFAC sanctions screening, ENS/SNS name resolution, on-chain wallet intel on Base. No account, no API key.

Person + company enrichment APIs powered by Data Legion. Per-call agent payment on Tempo MPP, x402 USDC on Base, and Solana MPP.

63 deterministic quant calculators + 10 composite workflows for autonomous financial agents. Options, derivatives, risk, portfolio optimization, statistics, crypto/DeFi, FX, macro, TVM. Pay-per-call USDC on Base or Solana via x402.

Verify x402 offers, terms, retry safety, and delivery evidence. Use free checks first and buy at most one existing ApexScout report only after explicit buyer approval.

AI-enhanced DeFi intelligence API. 22 endpoints across Trenches, Traders, LPs, DeFi, and cross-chain (deBridge). Pay-per-call via x402 on Solana, Base, and SKALE. Returns LLM-interpreted insights with confidence-scored signals. No API keys — payment is the only gate.

Real-time macro intelligence API for forex and CFD traders, plus deterministic market primitives. 14 endpoints: session briefs, economic events, COT positioning, commodities, equities, economic calendar, crypto, EIA inventory, directional sentiment, intermarket synthesis, rate differentials and macro regime classification — plus two zero-LLM primitives at $0.005: FX conversion at the official ECB reference rate, and a global stock-exchange market-status / trading-hours / holiday-calendar check. Pay-per-query via x402 micropayments on Base and Solana.

Global remittance intelligence API. 9 endpoints covering 200+ corridors: corridor analysis (best providers, fees, receive options), provider comparison with true total cost including FX markup, live ECB mid-market rate analysis, receive-country guides (mobile money/cash/bank), mobile money ecosystem (M-Pesa/GCash/bKash/MTN MoMo/Wave), KYC/AML compliance, industry news, diaspora community intelligence, and stablecoin-rail comparison (USDC/USDT on Base/Solana/Tron vs traditional providers, with honest receiving-country cash-out reality). $800B in annual flows. Pay-per-query via x402 on Base.

Sovereign cryptographic oracle delivering signed financial data payable by AI agents. 197 endpoints covering crypto spot/VWAP (10 exchanges incl. Bullish), stablecoin pegs, FX, economic indicators, commodities, DLC oracle, MSVI volatility index, MSXI sentiment index, MSSI stress index, MSTI crypto-TradFi contagion index, MESI equity stress index, MNVI NQ volatility index, TradFi Regime (RISK_ON/NEUTRAL/STRESS/PANIC), Liquidity Regime (DEEP/NORMAL/THIN/FRAGILE), Cross-Asset Divergence (NONE/LOW/MODERATE/HIGH/EXTREME), Regime Consensus (STRONG/MODERATE/WEAK/CONFLICTED), Marine Oracle (sea state, vessel tracking, voyage forecast), CME BTC COT institutional positioning, funding rate composite (MSFR, 10 exchanges), open interest, basis/carry, liquidation flow, orderbook imbalance, IV surface, SVI, greeks, term structure, instruments, DeFi yield (10 protocols, 7 chains), GPU compute (6 sources, 81 models), cross-chain gas oracle, and parametric weather/climate oracle (WRSI, rainfall, temperature, wind). Preview endpoints are intentionally stale (Layer 1: 60min, MSFR: 2h, indices: 60min, MESI/MNVI: 24h, Layer 2/3: 24h) — use paid endpoints for real-time signed data.

x402 buyer-decision MCP for execution-time endpoint preflight, service ranking, provider trust, token risk, and transaction checks. Paid answers are compact policy JSON, not broad reports.

Verify x402 offers, terms, retry safety, and delivery evidence. Use free checks first and buy at most one existing ApexScout report only after explicit buyer approval.

18 x402-paid services for AI agents — pay-per-call USDC on Base or Solana mainnet. On-chain anchoring and attestation, wallet screening, Web3 data, x402 spend accounting, content analysis, and verifiable randomness. No API keys, no accounts; settle per request.

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Discovers exact-price x402 data and risk actions that settle USDC on Base.

HALOWERK identwerk. Bezahlung über x402 in USDC auf Base Mainnet.

Instagram influencer discovery API for AI agents. Search influencers by keyword, niche, country, city, demographics, or follower range. Returns profiles with usernames, bios, follower counts, business categories, and verified business emails. Pay per search with USDC via x402 protocol on Base or Solana — no API keys, no signup. Free demo mode returns 3 cached results at no cost. Ideal for marketing automation, lead generation, influencer vetting, and building influencer databases programmatically.

Swap execution for autonomous agents on Solana, Base, Ethereum, Arbitrum, Polygon, Optimism, BSC and Avalanche. Quote for free, pay a toll to build a fee-inclusive unsigned transaction, sign with your own wallet. Non-custodial.

Birdie, the AI personal shopper. POST a shopping list (up to 3 items) and get 3 best-fit picks per item plus a stacked savings plan — loyalty %, coupons, discounted gift cards, and the right credit card — researched live across the PulseNetwork shopping fleet. Best fit to spec wins, not the cheapest listing. $0.25 per trip via x402 (USDC on Base; Solana accepted).

x402-paid API services: on-chain analytics (Dune SQL), web extraction, token metrics, wallet analysis, sentiment analysis, company research, answer-with-sources, crypto pricing

Pay-per-call market intelligence for AI agents, based on Korra (korra.finance). Live analyst answers, sentiment-vs-price divergence verdicts (crypto, US stocks, macro), falsifiable predictions, event and narrative probes, and a countable track record over the x402 payment protocol — USDC on Base, with a parallel Solana rail. No signup, no API key: payment is authentication. Descriptive research, not financial advice.

AI inference bridge for AI agents — pay per request with Solana USDC. No API keys, no registration.

Pay-per-call access to Vybe Solana analytics API

Look up a source now, or keep watching it. One-shot checks return current SEC filings (Form 4 insider trades parsed, 8-K items decoded), page text, RSS items, or a crypto price. Standing watches cover the gap between agent runs. No API key, no account — pay per call in USDC.

Spell check for your bot's EQ — flags when an agent sounds robotic and tells it how to fix itself, automatically, all day. Two equal ways to pay: crypto (fully autonomous, per call via x402) or normal card (USD) — a developer buys a credit pack once at /api/card/packs (optional monthly auto-refill subscription tops up the same credit token so the bot never runs dry) and the bot spends the credits automatically. Machine-to-machine human-likeness (EQ) scoring for AI-generated text. Benchmark your writing against 28 real human personality profiles — a category catalog with a benchmark for every kind of agent (support, sales, coding, medical, eldercare, voice, and more). Scoring is pure statistical math — no LLM calls: sub-millisecond compute, typical API response ~150ms, fast enough for real-time pre-send checks. POST /api/rewrite rewrites a bot's draft reply to match the target profile's measured dials (keywords, hesitation, punctuation, timing) and returns before/after scores proving the improvement — the fix, not just the diagnosis. Also offers a deterministic script-adherence check (POST /api/script-check) that flags on-script vs off-script claims against caller-approved material — explicitly not hallucination or factual-accuracy detection. Built to be wired in once as a permanent always-on tool: fund a burner wallet with USDC on Base one time (gasless — signing only) and every scoring call auto-pays via x402 with no human in the loop; setup recipe under 'Permanent tool setup' in /llms.txt. Free trial: 3 scores per caller. Paid validated sessions (leaderboard, certificates, duels) settle via x402 in SOL on Solana or USDC on Base, Polygon, Arbitrum, or Avalanche — basic session 270000 lamports, premium deep analysis 950000 lamports; live terms at /api/pricing.

Runtime surface of MIND Protocol: paid Solana data cards over x402, plus an MCP tool surface for audit-trail recording and mindprint proof verification.

Real-time skincare and K-beauty ingredient intelligence API. Synthesizes live regulatory and scientific data (EU CosIng, CIR/PubChem, AAD dermatology guidance, Korean MFDS context) into structured, actionable intelligence. 12 endpoints covering ingredient lookup, conflict checking, product decoding, pregnancy/nursing safety, fungal-acne safety, dupe finding, routine building, K-beauty vs Western comparison, claims/greenwashing detection, price-per-active value analysis, sensitive-skin screening, and retailer sale timing. Pay-per-query via x402 micropayments on Base or Solana.

SYNTHORA defidata: deFi market-data feed: perp open interest, funding rate, mark price and a directional signal across top assets (BTC/ETH/SOL/…), plus optional per-asset verdict. Deterministic, Ed25519-signed. SYNTHORA. First 3 calls FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment).

WURK is an agent-accessible platform where AI agents hire humans for microjobs, feedback, opinions, human-in-the-loop workflows, and app testing, while also buying social growth services. WURK exposes paid x402 resources on Solana and Base, MPP rails on Tempo and Solana, MCP integration, OpenAPI discovery, and installable Agent Skill files. Metaplex agent can claim a free job read: https://wurkapi.fun/metaplexwelcome.md

Paid x402 API tools for AI agents (USDC on Base). Official EU/global registries (GLEIF LEI, VIES VAT, Companies House, INSEE, EUR-Lex, ECB, BODACC, CVE, FDA), crypto pre-trade safety (Solana token rug/honeypot checks, perp derivatives, DEX/CEX spread), and agent decision endpoints (due-diligence dossiers, action preflight clearance, content security scans, output QA, seller trust score and deep seller audit, pre-payment firewall, OFAC wallet sanctions screening, macro/economic snapshot, cross-exchange trading signal, one-call pre-trade GO/NO-GO verdict, wallet x402 accounting ledger, proof-of-existence notary, token dossier, market intelligence report, multi-hop wallet forensics, decoded on-chain events). Real-time, jurisdictional, official data an agent cannot produce itself, returned as structured machine-readable verdicts. No API key, no account: payment is authentication.

Agent-native onchain intelligence for Solana traders: cross-venue perps funding (Jupiter, Adrena, Flash, Hyperliquid), smart-money & whale tracking, token due-diligence and rug detection, and wallet risk scoring. Pay-per-call via x402 (USDC) or Stripe — JSON for agents, natural-language briefings for LLMs.

Pay-per-call crypto derivatives intelligence API for autonomous agents and trading bots. ML price forecasts + perpetual swap signals for 16 crypto assets. USDC micropayments via x402 protocol on Base — no API key required.

Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

BAGS is an Agentic Commerce platform: API providers charge AI agents per request via x402, with USDC settlement on Base, Ethereum, Polygon, and Solana. This A2A endpoint is a thin concierge — it answers messages with pointers to the BAGS MCP server and public API, where the real tooling lives.

Japanese public holidays and business-day math: is-holiday checks, yearly lists, business-day counting and offsetting. Pay-per-call HTTP API using the x402 payment protocol (USDC on Base / Polygon / Solana) — no API key or signup. NOTE: this origin serves plain HTTP+x402, not the A2A JSON-RPC protocol; use the machine-readable interfaces below.

Japan Meteorological Agency forecasts, overviews, and weather warnings for every JP region, with city-name aliases. Pay-per-call HTTP API using the x402 payment protocol (USDC on Base / Polygon / Solana) — no API key or signup. NOTE: this origin serves plain HTTP+x402, not the A2A JSON-RPC protocol; use the machine-readable interfaces below.

Japanese company lookup, search, KYB/KYC verification, and one-call KYB reports over the official National Tax Agency corporate-number registry (5.78M companies). Pay-per-call HTTP API using the x402 payment protocol (USDC on Base / Polygon / Solana) — no API key or signup. NOTE: this origin serves plain HTTP+x402, not the A2A JSON-RPC protocol; use the machine-readable interfaces below.

Pay-per-call corporate registries and SEC filings search, product and retail intelligence, market data, currency exchange rates, B2B geolocation, and talent intelligence for AI agents, paid for with USDC on Base or Solana.

SYNTHORA cryptonews: real-time crypto news headlines with sentiment, ranked by importance. Aggregates keyless RSS feeds (CryptoPanic, CoinDesk, CoinTelegraph, Decrypt, Bitcoin Magazine) into deduplicated, freshness-and-source-weighted top headlines, each scored with a lexical bull/bear sentiment (very_bullish.very_bearish) plus an overall market sentiment. Filter by asset (BTC, ETH, SOL, XRP, and more) to get only headlines about that coin. Built for trading and quant agents that need a cheap, fast crypto news + sentiment pulse. Ed25519-signed.

Pay-per-call data API for AI agents: ERC-20 rug/safety scanning, wallet + contract intelligence, DeFi/TVL/yields, market and macro data, news, weather, FX. USDC on Base via x402 — no signup.

Economic-safety API for trading agents: executable (realizable) DEX swap quotes (POST /v1/quote, $0.02) and pre-trade token verdicts (POST /v1/pretrade/check, $0.05). Plain HTTP+JSON endpoints paid per-call via x402 v2 (USDC on Base mainnet/Polygon PoS/Arbitrum One/Solana mainnet, no API key) — not a full A2A task server; see https://api.getplexa.com/openapi.json for the exact contract and https://api.getplexa.com/llms.txt for how to pay. Contact the people running this API: [email protected] (a human reads it), https://t.me/getplexa_bot (Telegram), https://github.com/plexa-xyz (source: reference agent, MCP package). No SLA and no support tier — this is a pay-per-call API, not a subscription. Machine-readable contact card: https://api.getplexa.com/contact.

Deterministic paid IP-intelligence agent: send an IPv4/IPv6 address, get normalized geolocation (country, city, coordinates, time zone) and network (ASN, organization) data. Each lookup costs $0.01 in USDC, negotiated in-message via the x402 payment extension (Base or Solana mainnet). No accounts, no API keys.

Image hosting API for AI agents. Upload an image, get a public CDN URL. Images 1MB or under are free AND permanent; 1-10MB are free for 30 days, or permanent for $0.01 USDC. No accounts, no API keys. Payment via x402.