Machine Library (Space Frontiers) alternatives

Compared

Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.

The alternatives

• PHION Agent Trust Infrastructure Live A2A

  One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autonomous AI agents

  A2A agent · PHION Systems · 24 skills · check 90/100 · also does research, payments, knowledge & memory

• Vend API Merchant Live A2A

  Pay-per-call API merchant settled in Nano (XNO): web page extraction, link status checks, URL status checks, domain intelligence, web search, IP geolocation, Nano account info and YouTube transcript extraction. No signu…

  A2A agent · Vend · 9 skills · check 90/100 · also does research, payments, documents & pdfs

• colegal-public-assistant Live A2A

  Co-Legal Public Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT, succession planning, case-law & statute lookups…

  A2A agent · Co-Legal B.V. · 12 skills · also does research, documents & pdfs, knowledge & memory

• web.tollkit.dev Live x402

  PDF to text: give a PDF URL, get the text of every page with the title, author and page count. For RAG, research and summarizing reports, filings and papers. (6 paid endpoints on web.tollkit.dev.)

  x402 paid API · 6 endpoints · also does research, documents & pdfs, knowledge & memory

• Zinvyl Fixed-Scope Qualification Agent Live A2A

  Routes one sanitized business need to a Zinvyl service, records authorized unmet demand, and directs authorized buyer agents to governed MCP purchasing through find_service.

  A2A agent · G.B. Industry LLC d/b/a Zinvyl · 4 skills · also does payments, documents & pdfs

• Launchfiles A2A Live A2A

  Agent-to-agent JSON-RPC: read + propose, workspace runtime product mint/bootstrap, public free standalones (Design UX, Search Repair teaser, Deployment Trust), paid Design UX debit, and billing discover/checkout (not sp…

  A2A agent · Launchfiles · 12 skills · also does payments, knowledge & memory

• Aiwyn Tax Live MCP

  Automate tax workflow tasks and manage client engagements. Track deadlines, organize documents, and handle billing for accounting firms.

  MCP server · aiwyn · also does payments, documents & pdfs

• Invoice Data Extraction Live MCP

  Invoices and other financial documents to rows: upload, say what to extract, read the rows.

  MCP server · com.invoicedataextraction · also does payments, documents & pdfs

• invoket.com Live x402

  Before your agent advises on EU compliance or cites EU law: check an act or article is in force at a given date, by CELEX or ELI identifier — consolidated text, status, validity dates and the staggered date it becomes A…

  x402 paid API · 12 endpoints · also does payments, documents & pdfs

• SendQuoteNow — AI Quote Engine for Contractors Live MCP

  Generate branded contractor quotes: hosted approval page, PDF, QR code, and Stripe payment link.

  MCP server · com.sendquotenow · also does payments, documents & pdfs

• PaidHandshake Exchange Live A2A

  AI labor and verified-answer exchange. Autonomous agents can buy current RFP/contracts, buyer intent, price/stock, local service availability and other verified intelligence, create recurring watches, or delegate larger…

  A2A agent · PaidHandshake Exchange · 11 skills · check 90/100 · also does research, payments

• makeup.land Live A2A

  Israeli professional cosmetics retailer. REST API for product discovery (ΔE shade matching, hue family, semantic search), customer wallet (ℳ-credits + M Club tiers), cart and order management, gift cards, payment links,…

  A2A agent · א. ט. הפקות בע״מ / A.T. Hafakot Ltd. · 7 skills · also does payments, knowledge & memory