Oakstack alternatives
12 MCP servers, A2A agents and x402 APIs that also do email, documents & pdfs, ranked by how much they overlap with Oakstack (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Oakstack (this one) | MCP server | Yes | – | – |
| DeckExtract | MCP server | Yes | – | – |
| FinCraftly | MCP server | Yes | – | – |
| Avokata: Lithuanian law for your agent | MCP server | Yes | 22 | 80/100 |
| CoreNexis API | MCP server | Yes | – | – |
| PdfParse | MCP server | Yes | – | – |
| SiteCheck | MCP server | Yes | – | – |
| Unlayer: Email, Page & Document Templates for Developers | MCP server | Yes | – | – |
| sitecheck-api.workers.dev | x402 paid API | Yes | 12 | 88/100 |
| Agent Products | A2A agent | Yes | 20 | 60/100 |
| 01Mind | A2A agent | Yes | 10 | – |
| agents.daedalusdevelopmentgroup.com | x402 paid API | Yes | 12 | – |
| Anokha Web Tools | A2A agent | Yes | 12 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- DeckExtract Live MCP
Download DocSend and Papermark decks as PDF or PPTX, including email-gated and protected links.
MCP server · com.deckextract · also does email, documents & pdfs
- FinCraftly Live MCP
AI employees that run your CRM, invoicing, email, documents, dashboards and agents
MCP server · com.fincraftly · also does email, documents & pdfs
- Avokata: Lithuanian law for your agent Live MCP
Lithuanian law MCP: statutes, court practice, citations. Keyless connect, no signup.
MCP server · com.avokata · 22 tools · check 80/100 · also does email, documents & pdfs
- CoreNexis API Live MCP
PDF from HTML or Markdown, OCR, email validation, image conversion and hosting, QR and barcodes.
MCP server · com.corenexis · also does email, documents & pdfs
- PdfParse Live MCP
Extract PDFs into structured tables, query records, and configure document inbox workflows.
MCP server · io.github.PabloG6 · also does email, documents & pdfs
- SiteCheck Live MCP
29 pay-per-call agent tools: web reader, PDF, tech stack, email, domain, Solana, KYB. Paid via x402
MCP server · io.github.bck-stack · also does email, documents & pdfs
- Unlayer: Email, Page & Document Templates for Developers Live MCP
Generate email, page & PDF document templates as React code (Unlayer Elements) or AI; edit visually.
MCP server · com.unlayer · also does email, documents & pdfs
- sitecheck-api.workers.dev Live x402
EU VAT number check: format and checksum are tested locally first (a malformed number is rejected with HTTP 400 and no charge), then the official VIES service answers whether it is valid, with the registered name and ad…
x402 paid API · 12 endpoints · check 88/100 · also does email, documents & pdfs
- 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 · 20 skills · check 60/100 · also does email, documents & pdfs
- 01Mind Live A2A
A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-09-15): http…
A2A agent · 01Mind · 10 skills · also does email, documents & pdfs
- agents.daedalusdevelopmentgroup.com Live x402
DDG agent-payable service request (248 paid endpoints on agents.daedalusdevelopmentgroup.com.)
x402 paid API · 12 endpoints · also does email, documents & pdfs
- Anokha Web Tools Live A2A
Discovery agent for pay-per-call tools: describe what you need and it returns the matching paid endpoint, price and example call. Tools: read web pages and PDFs as Markdown, render Markdown to PDF, publish pages, charts…
A2A agent · Anokha Web Tools · 12 skills · also does email, documents & pdfs