Letterin alternatives
12 MCP servers, A2A agents and x402 APIs that also do documents & pdfs, jobs & hr, summarization & writing, ranked by how much they overlap with Letterin (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Letterin (this one) | MCP server | Yes | – | – |
| resolve402.dev | x402 paid API | Yes | 9 | – |
| Tailorwren by CyberMax | A2A agent | Yes | 2 | 60/100 |
| Context Studios MCP | MCP server | Yes | 40 | 90/100 |
| Belindoc Translator | MCP server | Yes | 22 | 80/100 |
| Amalgix Document Intelligence | MCP server | Yes | – | 55/100 |
| SparkForge | MCP server | Yes | – | 55/100 |
| App-Kit | MCP server | Yes | – | – |
| Shorty | MCP server | Yes | – | – |
| agentindex.world | x402 paid API | Yes | 12 | 88/100 |
| ForceDream | A2A agent | Yes | 12 | – |
| hydratrader.ai | x402 paid API | Yes | 9 | – |
| web.tollkit.dev | x402 paid API | Yes | 6 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- resolve402.dev Live x402
Hiring signals of a company: open jobs read from its public ATS board (Greenhouse, Lever, Ashby, SmartRecruiters, Recruitee, Personio, Workable, Teamtailor, Workday), summarized as buying signals (volume, last 30 days,…
x402 paid API · 9 endpoints · also does documents & pdfs, jobs & hr, summarization & writing
- Tailorwren by CyberMax Live A2A
Resume tailoring API: rewrites resume bullets to weave in a job ad's missing keywords using only the resume's own facts, and drafts cover letters (Workers AI). Resumes and job ads are never stored. Free: 2 AI bullet rew…
A2A agent · CyberMax · 2 skills · check 60/100 · also does jobs & hr, summarization & writing
- Context Studios MCP Live MCP
AI agency API: free tools for glossary, comparisons, blog, guides, estimates and consulting
MCP server · ai.contextstudios · 40 tools · check 90/100 · also does documents & pdfs, summarization & writing
- Belindoc Translator Live MCP
Translate PDF, Word, Excel, Markdown, image and video files with Belindoc, and rewrite subtitles.
MCP server · com.belindoc · 22 tools · check 80/100 · also does documents & pdfs, summarization & writing
- Amalgix Document Intelligence Live MCP
Cross-model evidence pipeline for financial filing and contract intelligence. Two core paid workflows — analyze_public_filing (SEC 10-K/10-Q/20-F, ticker/CIK lookup, metrics, risk changes, contradictions) and review_con…
MCP server · amalgix · check 55/100 · also does documents & pdfs, summarization & writing
- SparkForge Live MCP
Access a versatile collection of tools for media generation, web scraping, and cryptocurrency research. Convert between data formats, summarize long documents, and extract text from images or PDFs with ease. Streamline…
MCP server · henry-ships · check 55/100 · also does documents & pdfs, summarization & writing
- App-Kit Live MCP
SEO audit (400 checks), text readability and grammar check, PDF to images, image conversion.
MCP server · io.github.app-kit-dev · also does documents & pdfs, summarization & writing
- Shorty Live MCP
Summarize and transcribe videos, audio, documents and web pages; subtitles; search your library.
MCP server · com.aishorty · also does documents & pdfs, summarization & writing
- agentindex.world Live x402
Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET…
x402 paid API · 12 endpoints · check 88/100 · also does documents & pdfs, summarization & writing
- ForceDream Live A2A
ForceDream routes work to specialist agents and returns a verifiable record of what happened. Describe the work in plain language, such as extracting fields from a contract, summarising a document, or reviewing code. Fo…
A2A agent · ForceDream · 12 skills · also does documents & pdfs, summarization & writing
- hydratrader.ai Live x402
Summarize text. Classify sentiment. Rewrite. Extract keywords. Translate. When to use: cheap agent glue / probe steps for buyer-supplied text. Returns JSON for $0.01 per call in USDC on Base via x402. No API key. Local-…
x402 paid API · 9 endpoints · also does documents & pdfs, summarization & writing
- 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, summarization & writing
All Documents & PDFsAll Jobs & HRAll Summarization & writing