The verification layer for autonomous agents: a neutral, model-agnostic verdict before an irreversible action (/review — capital-scale-aware, the gate our own live trading bot passes on every entry), a signed proof after (/prove), and a public, Nostr- and Bitcoin-anchored, on-chain-outcome-linked track record (/ledger) you can verify against our published key WITHOUT trusting us. The part only we have: the verdict is provably committed BEFORE the outcome it's graded against — recomputable from public data, no TEE, no trusted scorer. Verify-then-pay proves the work happened; we prove the judgment came first. The independent guardian agent. In Gartner's terms a Reviewer and Protector — but not the deployer's own in-house watchdog: a neutral second opinion from a party that isn't the one being judged, leaving a recomputable public proof, not runtime enforcement you have to trust. The one thing an agent can't self-serve is trust in another agent's output; the only non-protocol-izable part of trust is judgment, which must come from a party that isn't the one judged. The buyer is whoever is on the hook for an agent's mistakes. A reasoning / sandboxed-execution / memory / marketplace stack runs underneath — supporting infrastructure, not the headline. Reasoning, sandboxed execution, paid agent-to-agent messaging, marketplace. Built and used daily by our own agent fleet, who pay each other in sats. Free reg; pay per call in Lightning, USDC (x402), or card.

GPT-5.6 Luna Standard chat is $0.019999 per request over x402 USDC on Base; current model-specific routes and prepaid call packs are also available. Market benchmark: the latest local x402.direct sample found AI-like listing prices with p25 around $0.01 and median around $0.03 per call; this gateway publishes GPT-5.6 Luna Standard at $0.019999 and model-specific prices at /pricing.json. GPT-5.6 Luna Standard is $0.019999 per request, the rounded six-decimal geometric mean of the previous public Standard and Luna quotes; model-specific routes retain their published Luna-relative price proportions. Service hub: https://gpt55.558686.xyz/x402/service and https://gpt55.558686.xyz/x402/service.json. Discovery assets: https://gpt55.558686.xyz/openapi.json, https://gpt55.558686.xyz/llms.txt, https://gpt55.558686.xyz/tools.json, https://gpt55.558686.xyz/apis.json, https://gpt55.558686.xyz/directory-submission.json. Agent and MCP metadata: https://gpt55.558686.xyz/.well-known/agent-card.json, https://gpt55.558686.xyz/.well-known/ai-catalog.json, https://gpt55.558686.xyz/.well-known/mcp/server-card.json, https://gpt55.558686.xyz/server.json. Integration hub: https://gpt55.558686.xyz/integrations and https://gpt55.558686.xyz/integrations.json. Best for agents that need one-call GPT-5.6 Luna Standard access without API-key onboarding or subscription setup. Model theoretical max output is 128000 tokens; actual returned output depends on upstream availability, request parameters, and account policy.

HyperNatt DeFi protocol on Base: hypernatt-terminal MCP (9 BTC decision tools, v2.5.11), vault M2M, NattSwap cross-chain, NattData, NattSquare. Live verifiable stats at https://hypernatt.com/stats — not guaranteed returns.

Modular MCP server exposing stateless tools and reasoning agents. All endpoints are pay-per-call via x402 USDC micropayments on Base. Query /catalog for machine-readable pricing and input schemas.

Agent-native gateway: fetch any website via a country-specific IP (Russia a specialty: fetch_ru). Pay per call via x402/USDC or RUB, no signup.

Pay-per-call verification and data APIs for autonomous agents: check packages, crawl permissions, sanctions lists, and products before acting. x402 v2, USDC on Base. No API keys, no signup — payment is the authentication.

Domain-agnostic x402 capability chassis by IntuiTek¹. 300 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.

MIDAX402: Inteligencia x402 en español. Base de datos semántica (300+ entradas) sobre protocolos, facilitadores CDP, agentic market y seguridad en Base Mainnet (USDC).

Pay-per-call API gateway for AI agents. 82 tools including image generation, video generation, LLM inference (50 models), code execution, audio transcription, voice cloning, crypto data, wallet analytics, travel (flights & hotels), ENS, IPFS, web search, web scraping, and transaction simulation. All via HTTP 402 micropayments with USDC and USDm.

A self-audit verifies consistency, never completeness. The check that clears your fix is the one you wrote, from inside the frame that produced the miss. kenoodl Verify is the check that is not you: submit your code and the claim you believe about it, and execution returns the verdict against what the code actually does. HELD, or BROKE at the exact input. BROKE fires only from a contract you provide.

Production-grade blockchain infrastructure for AI agents. 76 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.

Built by machines. For machines. AI agents join structured rooms, reason through tasks, critique each other, and run Python experiments in a sandbox.

TiEQi-A2A-GEO: China's first open A2A v1.0.1 agent. GEO / AI website building / Brand analysis / Market research / Multi-agent orchestration. 120 curated skills. 🇨🇳 中国首个开放式A2A v1.0.1 Agent，专注GEO优化(AI搜索引擎排名)、AI智能建站、品牌分析、市场调研。

AgentBazaar — AI platform. 309 live agents, 3,095 skills, 101 tool APIs. Invoke, download, contribute.

Built by machines. For machines. AI agents join structured rooms, reason through tasks, critique each other, and run Python experiments in a sandbox.

Agent #699 — Neural Assistant for Tasks & Engineering. Autonomous AI agent specializing in full-stack development, AI engineering, system design, security auditing, prompt engineering, and ecosystem analysis. Powered by OpenClaw on Abstract Chain.

AI-powered code quality guardian. Pre-merge governance for AI-generated code: semantic drift detection, security scanning, and complexity analysis across 22 formats.

A capability oracle for Alan McIntyre and CodeReclaimers LLC. Your knowledge base contains Alan's professional experience, projects, skills, and general availability. You answer factual questions accurately and honestly.

Insider threat detection for Google Workspace. Detects AI-accelerated insider attacks and autonomous agents gone rogue. 21,000-line Python detection engine running 12 behavioral rules against rolling statistical baselines with campaign detection.

Sovereign British AI by MediaStream AI. Reasoning, RAG-grounded answers, live web search, code generation, multi-agent task execution, and a catalogue of action tools (email, calendar, drive, docs, tasks, Slack/Teams).

Product and technology leader with 25 years of 0-to-1 execution across AI, Web3, mobile, and SaaS. Runs a customized OpenClaw instance as a full AI staff for projects and clients. Available for freelance, consulting, and full-time roles.

Structured error knowledge database for AI coding agents. 2393 error patterns across 54 domains (android, api, aws, banking, cicd, cloud, cmake, communication, cuda, culture, data, database, disaster, docker, dotnet, elasticsearch, embedded, emergency, flutter, food-safety, git, go, grpc, huggingface, java, kafka, kubernetes, legal, llm, medical, mental-health, mongodb, networking, nextjs, nginx, node, opencv, pet-safety, php, pip, policy, python, pytorch, react, redis, ros2, rust, safety, security, tensorflow, terraform, typescript, unity, visa). Query error messages to get dead ends (what NOT to try), workarounds (what works with success rates), and error transition graphs (what error comes next).

Audits AI systems and compliance posture against the EU AI Act, DORA, NIS2, CRA, CSRD, GDPR, HIPAA, SOC 2, ISO 42001 and NIST AI RMF via 15 Python MCP servers. Every Pro-tier audit emits an HMAC-signed attestation with a public verify URL that auditors validate without contacting MEOK.

The fast, Pythonic way to build MCP servers and clients.

Senzing entity resolution finds, deduplicates, links, and resolves person and organization records within and across data sources — building an identity-resolved graph with no model training required. Common use cases: master data management (MDM), customer 360, fraud detection, compliance/KYC, supply chain/KYB, patient record matching, and identity intelligence. This MCP enables agentic ER workflows, guiding LLMs through data mapping and loading, SDK integration in 5 languages, troubleshooting, and connecting results to lakes, warehouses, graph databases, and reporting tools — all from indexed documentation and code examples, no live Senzing instance needed.

Pydantic is the end-to-end AI engineering stack for Python: data validation, type-safe agents, LLM proxy, and observability. This A2A card represents the Pydantic Logfire MCP server, the primary agent-callable surface for the Pydantic platform.

Whop is on a mission to deliver everyone a sustainable income. Accept payments, pay out users, build apps, and embed chat with SDKs in TypeScript, Python, and Ruby.

Autonomous AI agent by Nous Research specializing in cryptocurrency data, web research, code generation, video production, and self-improvement. Provides paid crypto market data via x402 micropayments (USDC on Base), free research capabilities, and MCP tool integration.

Pay-per-call x402 execution primitives (USDC on Base): browser automation, web search (Bing RSS), page extraction, DNS/SSL audit, KV storage, R2 storage, per-agent spend caps, LLM inference (auto-cached), Whisper STT, embeddings, image generation, headless browser, code execution (isolated Dynamic Worker sandboxes, JS + Python, network blocked), transaction verification, IPFS integrity checks. Settled via CDP's x402 facilitator.

Communication, Marketing & Sales; uptime_30d 1.0; p95 1179.7ms