Quelvio alternatives
12 MCP servers, A2A agents and x402 APIs that also do documents & pdfs, knowledge & memory, ranked by how much they overlap with Quelvio (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Quelvio (this one) | MCP server | Yes | – | – |
| Colour Memory | MCP server | Yes | 40 | 80/100 |
| agent.halowerk.com | x402 paid API | Yes | 3 | 88/100 |
| Agent Products | A2A agent | Yes | 12 | – |
| agents.daedalusdevelopmentgroup.com | x402 paid API | Yes | 12 | – |
| Claix | A2A agent | Yes | 12 | – |
| colegal-public-assistant | A2A agent | Yes | 12 | – |
| embed.gedx402.com | x402 paid API | Yes | 1 | – |
| Machine Library (Space Frontiers) | A2A agent | Yes | 3 | – |
| RagSphere | A2A agent | Yes | 2 | – |
| web.tollkit.dev | x402 paid API | Yes | 6 | – |
| AI Resume Master | MCP server | Yes | – | – |
| Bespree Resumes | MCP server | Yes | – | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Colour Memory Live MCP
Colour meaning, history and evidence for AI: 45,000+ source-graded colour records and 91 tools.
MCP server · io.github.DigbyO · 40 tools · check 80/100 · also does documents & pdfs, knowledge & memory
- agent.halowerk.com Live x402
Takes two state documents — target (what the twin should look like) and observed (what was measured) — and returns a leaf-by-leaf comparison. Every leaf path carries one of five states: in_tolerance, out_of_tolerance, m…
x402 paid API · 3 endpoints · check 88/100 · also does documents & pdfs, knowledge & memory
- Agent Products Live A2A
Cloud infrastructure services for autonomous AI agents. 20 services: decision audit, persistent memory, fleet monitoring, content filtering, task handoff, wallet management, identity verification, distributed scheduling…
A2A agent · Pangeon Corp · 12 skills · also does documents & pdfs, knowledge & memory
- agents.daedalusdevelopmentgroup.com Live x402
DDG agent-payable service request (248 paid endpoints on agents.daedalusdevelopmentgroup.com.)
x402 paid API · 12 endpoints · also does documents & pdfs, knowledge & memory
- Claix Live A2A
Claix turns unstructured documents into typed JSON and queryable memory for AI agents. Extract PDF, Excel, Word, images, and text; ask persisted documents by document_id; reason across a knowledge space with space_id. O…
A2A agent · Claix · 12 skills · also does documents & pdfs, knowledge & memory
- 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 documents & pdfs, knowledge & memory
- embed.gedx402.com Live x402
Rerank documents against a query with BGE Reranker Base (@cf/baai/bge-reranker-base). POST query plus documents[]; returns relevance scores for search and RAG pipelines.
x402 paid API · 1 endpoint · also does documents & pdfs, knowledge & memory
- Machine Library (Space Frontiers) Live A2A
Research and commerce agent for the Machine Library knowledge platform by Space Frontiers Company: answers research questions grounded in multi-billion scholarly and public-interest documents with citations, explains MC…
A2A agent · Space Frontiers · 3 skills · also does documents & pdfs, knowledge & memory
- RagSphere Live A2A
Secure RAG agent for PDF, Excel, and YouTube analysis with rate limiting and API key protection.
A2A agent · RagSphere Team · 2 skills · also does 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 documents & pdfs, knowledge & memory
- AI Resume Master Live MCP
Build and edit real resumes in your AI Resume Master account, and export them to PDF.
MCP server · com.airesumemaster · also does documents & pdfs
- Bespree Resumes Live MCP
Create and edit saved resumes, make tailored or translated copies, and export PDF or Word.
MCP server · com.bespree · also does documents & pdfs