Fable vs Proof
A side-by-side look at the Fable and Proof MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Fable for coding agents work over a hosted endpoint; choose Proof for coding agents as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Fable when
- You need dedicated capabilities in the Coding Agents domain.
- You prefer a remote HTTP/SSE transport.
- You want tools like
plan, critique, ask.
Choose Proof when
- You need dedicated capabilities in the Coding Agents domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
PROOF_EMAIL, PROOF_PASSWORD, PROOF_ANON_KEY, PROOF_SUPABASE_URL, PROOF_SNAPSHOT.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Coding Agents | Coding Agents |
| Quality signal | 52/100 · Good | 41/100 · Fair |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | PROOF_EMAILPROOF_PASSWORDPROOF_ANON_KEYPROOF_SUPABASE_URLPROOF_SNAPSHOT |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 0 |
| Directory activity | 0 views 0 installs 0 upvotes | 0 views 0 installs 0 upvotes |
| Tools | 13 | Not listed |
| Full listing | View Fable | View Proof |
Tools & capabilities
Fable tools 13
planFlagship.** Turn a goal (+ optional context) into an executor-ready implementation plan: numbered steps, exact paths/signatures, edge cases, acceptance criteria, out-of-scope notes — written to be handed to a cheaper model and executed verbatim.critiqueCoverage-first review of code, a diff, or a design. Reports every finding with severity + confidence for downstream filtering. Optional `focus`.askRaw one-shot query to Fable. Multi-turn history, system prompt, effort, optional reasoning summary.goalWhat to build or fixcontextRelevant code, file tree, constraints, error output, prior attemptseffortlow`/`medium`/`high`/`xhigh`/`max` (default `high`)max_tokensMax tokens to generate (server default otherwise)contentCode, diff, or design to reviewfocusArea to weight, e.g. `security`, `concurrencypromptThe user messagesystem_promptSystem promptmessagesHistory as a JSON array of `{role, content}` (roles `user`/`assistant` only)- +1 more on the listing page
Proof tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Fable
{
"mcpServers": {
"fable": {
"url": "https://api.anthropic.com/v1"
}
}
}
Proof
{
"mcpServers": {
"proof-2": {
"command": "npx",
"args": [
"-y",
"@toremlabs/proof-mcp"
],
"env": {
"PROOF_EMAIL": "YOUR_PROOF_EMAIL_HERE",
"PROOF_PASSWORD": "YOUR_PROOF_PASSWORD_HERE",
"PROOF_ANON_KEY": "YOUR_PROOF_ANON_KEY_HERE",
"PROOF_SUPABASE_URL": "YOUR_PROOF_SUPABASE_URL_HERE",
"PROOF_SNAPSHOT": "YOUR_PROOF_SNAPSHOT_HERE"
}
}
}
}
Frequently asked questions
Fable is categorized under Coding Agents and uses a remote HTTP/SSE transport. Proof belongs to Coding Agents and uses a local stdio subprocess. Pick Fable for coding agents work and Proof for coding agents.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Fable has no declared pricing — check the project's own site. Proof has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add fable and proof-2 as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Fable has a quality signal of 52/100 (Good) with 0 views, 0 installs and 0 GitHub stars. Proof has 41/100 (Fair) with 0 views, 0 installs and 0 GitHub stars.