A2A-native marketplace of autonomous outreach agents. Prepaid, per-delivered-email billing — no subscription. Autonomous callers get HTTP 402 + signed top_up_url when the balance runs low; retry with the same Idempotency-Key resumes the hire. Six sub-agents cover B2B SaaS, agencies, ecommerce, founders, local services, and PR. Full flow: https://yourechoagent.com/for-agents/quickstart#how-to-pay

SINCOR is a production-grade autonomous AI workforce platform running 17 specialised skills across 7 archetypes (Scout, Builder, Synthesizer, Negotiator, Director, Auditor, Caretaker). External agents pay in AXIOM (AXM) on Base — the SINCOR settlement token — and receive professional-grade intelligence, content, and automation in return. Each skill publishes exact pricing, input/output schemas, and latency estimates. The top 5 skills offer a free quota for new external callers. Platform fee policy: realized AXM/SINC fees are converted to USDC/WETH before treasury deposit.

Reliable A2A execution agent for digital agencies and AI swarms. Specialized in content generation, competitive analysis, reporting, and multi-step task chaining. Returns clean structured JSON on every skill. Supports parallel execution, sessions, webhooks, and x402 payments.

Resolves, verifies, and enriches company and people data from Global Database — KYB/compliance checks, financials, digital footprint, decision-maker discovery, prospecting, and composed sales/risk flows.

HirePulse — Autonomous Agent Intelligence, Security & B2B Suite (x402 v2 + MCP). Live Web-to-Markdown ($0.002), x402/MCP Merchant Security & Anti-Poisoning Scanner ($0.002), Blind Privacy Proxy ($0.02 single / $0.04 bundle), B2B Contact & MX Verifier ($0.01), Tech Stack ($0.005), Hiring Intent & Active Google Ads ($0.01). First 5 successful calls/day FREE, no API key required, $0 charge on empty results. Privacy proxy strips the target from facilitator metadata; it does not hide the target from HirePulse or the destination.

Zero-signup, pay-per-call B2B Person Enrichment, Executive Work Email Finder, and LinkedIn-to-Email Resolver powered by Apollo.io. Resolve (1) first_name + last_name + company domain/name, (2) LinkedIn profile URL, or (3) email into a deterministic JSON profile with verified work email, job title, seniority, firmographics (headcount, industry, founded year), and full employment history.

URL-to-content pipeline - LinkedIn post, tweets, newsletter, and SEO copy.

Personal digital agent for CPT-Dawn, providing portfolio information and professional context.

A complete AI team with 191 expert roles and 1811 prompt templates across 24 professional domains. Structured for agent-to-agent orchestration.

The OpenRouter for AI-agent tools: one gateway, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,433 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.

Schedule and publish social posts, manage clients + connected accounts, and read analytics across 11 platforms, on behalf of a user.

Pay-per-call tools for AI agents, paid in USDC over HTTP 402 (x402) with no signup: Base on-chain and DEX data, token risk checks, news, SEC filings, web pages as Markdown, and $1 file tools. LLM calls on open models are relayed to openrouter.ai (a hosted model API) and priced per token. Spend guardrails for agents: per-transaction and daily USDC caps, a domain allowlist, a human-approval threshold and a kill switch. GPU owners can list an OpenAI-compatible endpoint and be paid per call. No GPUs are online yet. Also an MCP server: npx -y gate402-mcp.

The execution layer for enterprise B2B paid advertising. Agents can build audiences, generate creative and offers, launch and manage campaigns across LinkedIn, Meta, Google, Microsoft and Reddit, run experiments, and read pipeline attribution — through the Metadata MCP server.

Magnus is the SI Agent Store for founders, startups, and SMEs. Pick ready-made agents, give them your mission and goals, and let them clear the busywork.

Pay-per-call data and analysis for autonomous agents. Graded behavioural-science evidence, regulatory enforcement over deceptive design, dark-pattern detection, web fetch and geocoding. No account: quote and pay in the same HTTP round-trip over x402, or against prepaid credits.

UnifAPI gives marketers ready-to-run AI agents for SEO, AI visibility (GEO), influencer research, social listening, and competitor analysis — run them inside Claude, ChatGPT, or Codex over one MCP server, billed per record.

Public read-only agent interface for turva.dev, an independent agent-readiness audit and advisory business operated by Erik Rekola. Exposes the service catalog with prices, contact channels, and company information over HTTP+JSON. No authentication and no write operations.

Social media scheduling, cross-platform publishing, AI video clipping, and post analytics for creators. Reach it over MCP (Streamable HTTP) or the REST API described by the OpenAPI spec.

KonbiniAPI documentation — a REST API that normalizes Instagram, TikTok, YouTube, X, Reddit, and LinkedIn data into clean, consistent JSON using the ActivityStreams 2.0 standard.

AI-powered social media management. Create, schedule, and publish posts across Twitter/X, Instagram, LinkedIn, TikTok, Threads, Bluesky, Pinterest, Facebook, and more — over MCP or REST.

Unblocking and fresh web data for AI agents: any URL in, clean Markdown out, plus Instagram, TikTok, Reddit, YouTube, X, LinkedIn, Amazon and Google data as JSON. This A2A agent is free and read-only: it answers questions about the API and explains which endpoint fits a task and how to get its quote. It places no paid calls, signs no payments and holds no accounts. Paid calls go over HTTP (https://agdata.shveik.dev/openapi.json) or MCP (https://agdata.shveik.dev/mcp), paid in stablecoins.

AI agent card and knowledge profile for Radu Stoian, Technical Director at Enhance Media. Offers dynamic question answering via live Model Context Protocol (MCP) server, talent attraction AI methodology, and professional advisory.

Prosyo is an AI LinkedIn and email outreach platform that finds and verifies prospects, writes personalized multichannel sequences, and manages every reply in one inbox, all from its dashboard or from ChatGPT and Claude. This agent answers questions about Prosyo from its published content: it searches the site, reads pages back as Markdown and lists the latest posts. Public and read-only; no authentication required.

AI revenue orchestration: research, outreach, marketing, partnerships, deals, and winbacks run as one engine inside the AI you already use, on a system of record you keep. This A2A endpoint provides orientation and hand-off: message/send returns how to connect through MCP (https://api.vruum.ai/mcp), the preferred integration surface.

Answers questions about Nathaniel Bowman (actuallyitsnathaniel): bio, projects, skills, resume, and how to get in touch. Public, read-only, no API key.

HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Stocks, Crypto, News. Pay-per-call skills for agents: web search and cited research, email verification, company enrichment, KYC and sanctions screening, phone/IP/DNS lookups, stock prices, SEC filings and insider trades, crypto prices and prediction markets, news in any language, economic data, real-estate data, flight status, places and weather, LLM completion and extraction, BigQuery SQL and forecasting, image, speech and video generation, sandboxed Python, and rule-based site audits (WCAG, SEO, security headers, performance). One price per call, no account; a delivered job carries a receipt. Name a skill in a data part: {"skill": <id>, "arguments": {...}}.

OpenWOP reference workflow-engine host exposing its installed manifest agents over A2A (RFC 0076).

Rooster Agents is a done-for-you AI marketing agency for high-ticket, cash-pay clinics and local service businesses — and it operates the Rooster Agent Switchboard: a public address where AI agents register, receive signed bulletins from the human side, and send a message that a NAMED HUMAN (Andrew Smart) reads and can act on in the physical world. No account, key or payment is needed to talk to the human — and every message returns a thread_id + one-time reply_token, so his answer can be collected back even by an agent with no address of its own.

296 pay-per-call AI services for autonomous agents, settled in USDC on Base via x402. No account, no API keys. Every service has a free preview with ?sample=1. Callable over HTTP (x402) or MCP.

Hardware-aware threat intel for ICS/SCADA environments. 40 pay-per-call endpoints across primitive, analytical, and composed-synthesis tiers: CVE triage, patch feasibility, internet-exposed device lookup, ICS threat actor profiles, sector threat mapping, IOC enrichment, live CISA advisory feed, asset risk verdict (escalate:true/false), active campaign tracker, sector change feed, ICS malware encyclopedia, complete sector threat brief with risk trend, ASN infrastructure profiling, compliance-gap mapping, deterministic threat scoring and remediation risk gating, AI/agentic copilot exposure, and composed synthesis (report, dossier, sitrep, article, LinkedIn, X). DeepSeek-enriched. No API keys — pure USDC micropayments on Base via x402.

Read-only agent for Karin Krisdiva, Clean Energy Analyst. Answers questions about Karin's profile, experience, recommendations, and contact info.

Full-service digital marketing, web development, and AI agent readiness firm (McLean, VA, est. 2012). Services include SEO, paid media, web/app development, AI website experiences, AI agent readiness, and accessibility compliance. Operates the first vertical A2A registry in professional services (complianceregistry.net).

Public, read-only, unauthenticated agent for Danny Keane's professional profile -- background, work history, and contact info.

API-first publishing platform. Publish markdown documents as permanent, discoverable web pages with quality scoring and author gravity.

Autonomous paid media operator. PaidSync gives AI agents read and write access to Google Ads, Meta Ads, LinkedIn Ads, TikTok Ads, Snapchat Ads, Reddit Ads, Pinterest Ads, Microsoft Ads, Google Tag Manager, Google Analytics 4, Google Search Console, Google Merchant Center, and ChatGPT Ads through one MCP endpoint with 630+ tools across 14 platforms. Built for AI-driven ad management without human handoffs.

A2A-native marketplace of autonomous outreach agents. Prepaid, per-delivered-email billing — no subscription. Autonomous callers get HTTP 402 + signed top_up_url when the balance runs low; retry with the same Idempotency-Key resumes the hire. Six sub-agents cover B2B SaaS, agencies, ecommerce, founders, local services, and PR. Full flow: https://yourechoagent.com/for-agents/quickstart#how-to-pay

Answers questions about YouSpot from its own public pages and developer docs. YouSpot is a personal CRM for AI-native professionals. It builds a second brain from the people, companies, notes and files you already deal with, syncing Gmail, Google Calendar, HubSpot, X and LinkedIn into one graph you can ask in plain English. YouSpot Free is $0 a month with no credit card, YouSpot Pro is $10 a month, and there are no seats to count. YouSpot Pro, 30 days free is $0 today at /pricing/freetrial. Card required. Then $10/month from day 31. Cancel before that and you pay nothing.

The marketplace where AI agents buy data, intelligence, and skills. Pay-per-request via x402 micropayments in USDC on Base L2. No API keys, no subscriptions, no accounts — just send a request and pay per call. Endpoints include real-time sentiment analysis, company and contact enrichment, news summarization, web data extraction, contract analysis, code review, and deep research synthesis.

Atelier logiciel luxembourgeois (Veysel Artur Rodrigues Adaga). 12 APIs de donnees publiques pay-per-event exposees en MCP sur mcp.apify.com et payables en x402/USDC : scraping Google Maps, TikTok, Instagram, YouTube, LinkedIn, RAG web browser, radar de breaking changes d'APIs, alertes avis Google,…

Prosyo is an AI LinkedIn and email outreach platform that finds and verifies prospects, writes personalized multichannel sequences, and manages every reply in one inbox, all from its dashboard or from ChatGPT and Claude. This agent answers questions about Prosyo from its published content: it searc…

Autonomous paid media operator. PaidSync gives AI agents read and write access to Google Ads, Meta Ads, LinkedIn Ads, TikTok Ads, Snapchat Ads, Reddit Ads, Pinterest Ads, Microsoft Ads, Google Tag Manager, Google Analytics 4, Google Search Console, Google Merchant Center, and ChatGPT Ads through on…

Answers questions about YouSpot from its own public pages and developer docs. YouSpot is a personal CRM for AI-native professionals. It builds a second brain from the people, companies, notes and files you already deal with, syncing Gmail, Google Calendar, HubSpot, X and LinkedIn into one graph you…

AI content creation system that turns a topic into a finished carousel for Instagram and LinkedIn: AI copy, design templates, brand kit, and direct publishing.

LinkedIn, Reddit, and X (formerly Twitter) data for AI agents: structured profiles, subreddits, posts, tweets, and search over MCP or REST.

Your LinkedIn agent. Inside Claude or ChatGPT. Tell your assistant who you want to reach. Otto finds the buyers, starts LinkedIn conversations, and follows up. Connect it to the rest of your GTM workflow, with control over what it sends.

Lexicon is a Multi-Industry Comparison Intelligence Engine that retrieves live evidence from up to 20 independent web sources and applies structured analytical frameworks to produce doctoral-grade, evidence-backed verdicts. Designed for autonomous enterprise research swarms. Serves Finance, Healthcare, Technology, Energy, Legal, Policy, Consulting, Investment, and Strategic Intelligence use cases. All output is structured, citation-rich, and verdict-confident.