Proposa: Proposal Software for Freelancers Featuring MCP Integration

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Proposa is a proposal management application aimed at freelancers, enabling users to create, track, and manage client proposals. Along with manual editing, it integrates with external AI agents via the Model Context Protocol (MCP) to draft proposals from user-provided notes.

Key points

  1. Interactive proposals accessible by clients via a secure link with no account required to view, accept, reject, or comment.
  2. Integration with external AI agents (such as Codex) using the Model Context Protocol (MCP), avoiding internal token markups by relying on the user's existing AI subscriptions.
  3. Human-in-the-loop workflow: All write actions and proposal publishing require explicit user authorization.
  4. Unified client workspace combining proposals, progress updates, and project documents to eliminate back-and-forth PDF emails.
  5. Tiered pricing structure offering early one-time lifetime purchases ($9.99 and $19.99) transitioning to a monthly fee ($12/month) after 150 users.

Why it matters

It serves as a practical example of the Model Context Protocol (MCP) applied to operational business workflows. Instead of reselling wrapped LLM tokens, the application exposes structured tools directly to existing AI assistants.

Analysis

Proposa targets the friction in traditional proposal drafting and client communication. By acting as an MCP-compatible server/workspace, it allows assistants to read authorized context and create structured drafts via defined APIs rather than fragile scraping. Guardrails ensure that agents cannot overwrite client decisions or publish without direct approval. For independent professionals, this approach cuts down administrative overhead while providing clients with a clean web interface without sign-up hurdles.

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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