# Delimit Mcp Server

> The merge gate for AI-written code, with signed, replayable attestation. Works across Claude Code, Codex, Cursor, and Gemini CLI.

- **Type:** MCP server
- **Install:** `agentstack add mcp-delimit-ai-delimit-mcp-server`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [delimit-ai](https://agentstack.voostack.com/s/delimit-ai)
- **Installs:** 0
- **Category:** [Integrations](https://agentstack.voostack.com/c/integrations)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [delimit-ai](https://github.com/delimit-ai)
- **Source:** https://github.com/delimit-ai/delimit-mcp-server
- **Website:** https://delimit.ai

## Install

```sh
agentstack add mcp-delimit-ai-delimit-mcp-server
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# `` Delimit

**The merge gate for AI-written code, with signed, replayable attestation.**

Wrap any AI coding assistant (Claude Code, Codex, Cursor, Gemini CLI) with a governance chain that runs your gates, records what changed, and signs a replayable receipt for every merge.

[](https://www.npmjs.com/package/delimit-cli)
[](https://github.com/delimit-ai/delimit-mcp-server)
[](https://github.com/marketplace/actions/delimit-api-governance)
[](https://opensource.org/licenses/MIT)
[](https://glama.ai/mcp/servers/delimit-ai/delimit-mcp-server/score)

```console
$ delimit wrap -- claude "fix the flaky test in tests/api.spec.ts"

✓ repo_diagnose
✓ security_audit       0 critical · 0 secrets
✓ test_smoke           165/165
✓ changed_files        1
✓ attestation signed   att_a05050eb8e13277e
                       delimit.attestation.v1 · HMAC-SHA256
                       replay → https://delimit.ai/att/att_a05050eb8e13277e
```

Every wrapped run emits a `delimit.attestation.v1` bundle: repo head before/after, changed files, gate results, HMAC-SHA256 signature, and a replay URL. Advisory by default; flip to enforcing when you're ready.

---

## Fastest path to value: `delimit check`

Zero-config PR safety gate. No `init`, no setup, no account, no keys — run it on any repo and it applies deterministic checks (breaking API changes + leaked secrets) to your staged or modified files.

```bash
npx delimit-cli check
```

```console
$ delimit check

  Delimit Check

  Policy: default | Base: HEAD | Specs: 1

  + api/openapi.yaml — clean

  PASSED — no breaking changes, no leaked secrets
```

When a check finds a breaking change or a leaked secret, it prints the offending file and the issue and exits non-zero — so it drops straight into a pre-commit hook or CI step.

Common options:

```bash
delimit check --staged          # only check staged files
delimit check --base main       # compare against a git ref (default HEAD)
delimit check --fix             # show migration guidance for violations
delimit check --record          # write a content-pinned record of this check
```

`--record` writes a content-pinned record of the check to `.delimit/records/check-.json` (or a path you name). That record is the precursor to the signed, replayable Seal attestation — the same evidence shape, pinned to the exact content you checked.

  Methodology · cal.com v2 worked example · Workflow guide · Website

---

## Worked examples

Real, reproducible merge-gate runs against public API specs:

- **[OpenAI OpenAPI: a year of AI frontier evolution under a cross-vendor merge gate](https://delimit.ai/reports/openai-openapi-attestation)** — OpenAI (openai/openai-openapi)
- **[Stripe v1 OpenAPI: 57 days under a merge gate](https://delimit.ai/reports/stripe-openapi-attestation)** — Stripe (stripe/openapi)
- **[Anthropic API: 76 days under a cross-vendor merge gate](https://delimit.ai/reports/anthropic-api-attestation)** — Anthropic (anthropics/anthropic-sdk-python)
- **[Twilio v2010 OpenAPI: 55 days under a merge gate](https://delimit.ai/reports/twilio-api-attestation)** — Twilio (twilio/twilio-oai)
- **[Docusign eSignature v2.1 OpenAPI: 46 days under a merge gate](https://delimit.ai/reports/docusign-esign-attestation)** — Docusign (docusign/OpenAPI-Specifications)
- **[Supabase Auth OpenAPI: 57 days under a merge gate](https://delimit.ai/reports/supabase-auth-openapi-attestation)** — Supabase Auth (supabase/auth)
- **[cal.com v2 OpenAPI: 60 days under a merge gate](https://delimit.ai/reports/cal-com-v2-attestation)** — cal.com (calcom/cal.com)
- **[EU TED v3 procurement API: $ref'd component-schema drift under a merge gate](https://delimit.ai/reports/eu-ted-v3-attestation)** — European Commission (TED v3 Public API)
- **[Cross-agent handoff: one artifact, four CLIs](https://delimit.ai/reports/cross-agent-handoff)** — Cross-CLI session handoff (worked example)
- **[delimit-mcp-server (self-attestation): same merge gate, third artifact class](https://delimit.ai/reports/delimit-mcp-server-tdqs)** — delimit-mcp-server (self-attestation)

See the full index at **[delimit.ai/reports](https://delimit.ai/reports)**. For the schema and signing methodology behind every report, see **[delimit.ai/methodology/mcp-attestation](https://delimit.ai/methodology/mcp-attestation)**.

---

## Golden Path — your first 10 minutes

The merge gate for AI-written code, end to end: lint a spec, see exactly what breaks, classify the bump, settle the hard calls with multiple models, and walk away with a signed, replayable attestation. Then keep the context that survives across sessions and models.

### 1. Install

```bash
npx delimit-cli scan          # discovery: finds your OpenAPI specs, frameworks, security issues, tests
npx delimit-cli init          # wire up the merge-gate config (--preset strict | default | relaxed)
```

`scan` (`delimit_scan`) reports what Delimit can do for this repo. `init` (`delimit_init`) drops in the policy preset and merge-gate config. No account, no keys.

### 2. The merge gate, end to end

**Lint the spec change (the gate).** Baseline vs. proposed, with policy applied — one pass/fail verdict.

```bash
npx delimit-cli lint old.yaml new.yaml       # tool: delimit_lint
```

**See exactly what breaks.** Pure structural diff — added/removed/modified endpoints, schemas, params, no policy.

```bash
npx delimit-cli diff old.yaml new.yaml       # tool: delimit_diff
```

**Classify the bump.** Deterministic MAJOR/MINOR/PATCH/NONE — same input, same answer, every time.

```text
delimit_semver       → MAJOR/MINOR/PATCH/NONE + next version string
delimit_impact       → blast radius: scans your dependency manifest for downstream callers (informational)
```

**Settle the hard calls.** When the gate verdict is a judgment call, put it to multiple models and let them debate to consensus.

```bash
npx delimit-cli deliberate "Is dropping the deprecated v1 /users field a safe MINOR?"
#   tool: delimit_deliberate — 3 free, then bring your own key
```

**Capture the signed, replayable attestation.** After a gate event (deploy / security / test / audit), record the evidence bundle and verify it any time.

```text
delimit_evidence_collect   → signed evidence bundle for the audit trail        (Pro)
delimit_evidence_verify    → confirm a bundle hasn't been tampered with         (Pro)
delimit_seal_verify        → check a Delimit Seal receipt against its bundled   (Free)
                             Layer-0 constitution — offline-verifiable
```

Every receipt is offline-verifiable: `npx delimit-cli seal-verify `, or open its `delimit.ai/att/` replay URL.

### 3. Context that survives sessions and models

Decisions, constraints, and tasks persist across sessions and across AI assistants — switch from Claude Code to Codex, Cursor, or Gemini CLI without losing the thread.

**Memory** — persist and recall the *why*, not just the diff.

```bash
npx delimit-cli remember "v1 /users field is frozen until Q3 — downstream billing depends on it"
#   tool: delimit_memory_store
npx delimit-cli recall billing               # local recall over your saved memories (Free)
```

For semantic recall by meaning across sessions, the assistant calls `delimit_memory_search` (Pro) directly.

**Ledger** — one task list, shared across every assistant and session.

```text
delimit_ledger_add        → record a task/bug/feature/strategic item
delimit_ledger_context    → session-start: top open items by priority (what's queued)
delimit_ledger_done       → close with a note (auto-captures a PR URL as ship proof)
```

That's the loop: gate the change, sign the proof, keep the context. Run it once on a real spec and you've used the whole merge gate.

---

## Think and Build

Beyond the merge gate, Delimit orchestrates multi-model deliberation and autonomous builds. `delimit think` dispatches a strategic question to Claude, Codex, Gemini, and Grok; `delimit build` activates a background daemon that executes ledger tasks through the gate chain. `delimit vault` manages local secrets (AES-256).

Works across any configuration, from a single model on a budget to a full panel.

---

## Try it in 2 minutes

```bash
npx delimit-cli doctor            # 14 prescriptive checks — tells you exactly what to fix
npx delimit-cli status            # Visual dashboard of your entire governance setup
npx delimit-cli simulate          # Dry-run: see what would be blocked before you commit
npx delimit-cli scan              # Instant health grade for your API spec
npx delimit-cli try owner/repo    # Try governance on any GitHub repo
```

No API keys. No account. No config files.

### Pick your first win

**Protect my API** — catch breaking changes before merge:
```bash
npx delimit-cli try
# Creates a sample API, introduces breaking changes, shows what gets blocked.
# Saves a governance report to delimit-report.md
```

**Watch for drift** — detect spec changes without review:
```bash
npx delimit-cli init        # Sets up governance + drift baseline
# Weekly drift checks run automatically via GitHub Action
```

**Run PR copilot** — governance gates on every pull request:
```yaml
# .github/workflows/api-governance.yml
- uses: delimit-ai/delimit-action@v1
  with:
    spec: api/openapi.yaml
# Posts gate status, violations, and remediation in PR comments
```

---

## What's New

*Gate every AI-assisted invocation. Ship the receipts.*

- **`delimit wrap`** — pipe `claude -p`, `cursor`, `aider`, `codex`, or any AI-assisted CLI through a signed governance gate. Snapshots the git diff before/after, runs lint + tests, HMAC-signs an `att_*` attestation, emits a public replay URL. Advisory by default; `--enforce` blocks CI on policy violations; `--max-time ` is a kill switch that tags the attestation as a `liability_incident` and prints a cross-model handoff command.
- **`delimit trust-page`** — renders a directory of attestations into a static HTML trust page + JSON Feed 1.1 feed. Single file, no framework, offline-renderable. Deploy anywhere.
- **`delimit ai-sbom`** — aggregates attestations into a CycloneDX 1.6 bill-of-materials with AI-specific fields (detected models per vendor, tool-call surface, policy gate counts). Pipe straight into procurement.
- **Cross-model by construction** — `wrap` is agnostic to the producer. Same attestation schema whether the pipe upstream is Claude Code, Cursor, Aider, Codex, or Gemini CLI. Switch producers without losing the audit chain.

```bash
# Gate any AI-assisted CLI
delimit wrap -- claude -p "add tests for payments"
#   → att_7d556843c84fb881 signed, replay: https://delimit.ai/att/att_7d556843c84fb881

# Kill switch + handoff after 60s wall-clock
delimit wrap --max-time 60 -- cursor edit "refactor auth middleware"
#   → if killed: kind=liability_incident
#   → suggested: delimit wrap -- claude -p "refactor auth middleware"

# Render accumulated attestations as a public trust page
delimit trust-page -o ./trust
#   → ./trust/index.html (+ feed.json)

# Build a CycloneDX-AI bill of materials
delimit ai-sbom -o ./ai-sbom.json
#   → components: 4 models detected, 187 gates run
```

## Earlier releases

*The highest state of AI governance — earlier features still active.*

- **`delimit doctor`** -- 14 prescriptive diagnostics. Every failure prints the exact command to fix it. `--ci` for pipelines, `--fix` for auto-repair.
- **`delimit simulate`** -- policy dry-run. See what would be blocked before you commit. The `terraform plan` for API governance.
- **`delimit status`** -- visual terminal dashboard. Policy, specs, hooks, CI, MCP, models, memory, ledger, evidence, git branch. `--watch` for live refresh.
- **`delimit report`** -- governance report. `--since 7d --format md|html|json`. Audit-friendly output for PRs and compliance.
- **Memory hardening** -- SHA-256 integrity hash + source model tag on every `remember`. Cross-model trust, verified on every `recall`.
- **Tag-based publishing** -- automated gateway sync, no more version drift between source and npm bundle.

### Multi-Model Deliberation

Run your question through 4 AI models simultaneously. They debate each other until unanimous agreement.

```bash
delimit deliberate "Should we build rate limiting in-house or use a managed service?"
```

```
  Round 1 (independent):
    Claude:  Build in-house. Redis sliding window is 50 lines.
    Gemini:  Build. You already have Redis.
    Codex:   Agree — but add circuit breaker for Redis failures.
    Grok:    Build. Managed service costs $200/mo for 50 lines of code.

  Round 2 (deliberation):
    All models: AGREE

  UNANIMOUS CONSENSUS (2 rounds, confidence 94/100)
  Build rate limiting in-house with Redis + circuit breaker.
```

3 free deliberations, then BYOK for unlimited. Works with Grok, Gemini, Claude, GPT-4o.

### v4.1

- **TUI** -- terminal-native Ventures panel, real `delimit think` and `delimit build` commands
- **Security hardening** -- notify.py stubbed in npm, axios pinned against supply chain attacks
- **Free tier restructure** -- deliberations use Gemini Flash + GPT-4o-mini (cost:  **Breaking Changes Detected**
>
> | Change | Path | Severity |
> |--------|------|----------|
> | endpoint_removed | `DELETE /pets/{petId}` | error |
> | type_changed | `/pets:GET:200[].id` (string -> integer) | warning |
> | enum_value_removed | `/pets:GET:200[].status` | warning |
>
> **Semver**: MAJOR (1.0.0 -> 2.0.0)
>
> **Migration Guide**: 3 steps to update your integration
>
> ### Governance Gates
> | Gate | Status | Chain |
> |------|--------|-------|
> | API Lint | Pass/Fail | lint -> semver -> gov_evaluate |
> | Policy Compliance | Pass/Fail | policy -> evidence_collect |
> | Security Audit | Pass | security_audit -> evidence_collect |
> | Deploy Readiness | Ready/Blocked | deploy_plan -> security_audit |

---

## Adopt with minimum privilege

You don't have to trust a large tool surface on day one. The safe on-ramp:

**Phase 1 — read-only governance (free, no account).** Start with the tools that
only read your repo and write reports: `delimit_lint`, `delimit_diff`,
`delimit_semver`, `delimit_policy`, `delimit_explain`, `delimit_scan`, and
`delimit_seal_verify`. If your MCP client supports per-tool allowlists, grant
exactly those. Nothing in this set executes, deploys, or posts anywhere.

**Phase 2 — opt into side effects deliberately.** Tools that write evidence
bundles, open PR comments, or run deploys (`delimit_security_audit`,
`delimit_deploy_*`, agent orchestration) are tier-gated; enable them once
phase 1 has earned its keep in your CI.

**Pin the Action to a commit SHA.** `@v1` is a floating tag. For
supply-chain-sensitive pipelines, pin the exact commit and bump on review:

```yaml
- uses: delimit-ai/delimit-action@   # gh api repos/delimit-ai/delimit-action/git/refs/tags/v1
```

**Keep BYOK keys out of plaintext config.** If you bring your own model keys
for deliberation, store them with `delimit_secret_store` (encrypted vault,
access-logged via `delimit_secret_access_log`) rather than in dotfiles.

Our own releases ship under the same discipline: every release carries a
signed, replayable Seal receipt (see the latest
[release assets](https://github.com/delimit-ai/delimit-mcp-server/releases) —
verify with `npx delimit-cli seal-verify ` or at its
`delimit.ai/att/` replay URL), plus SLSA provenance on npm.

---

## CLI commands

```bash
npx delimit-cli scan                             # Instant spec health grade + recommendations
npx delimit-cli pr owner/repo#123                # Review any GitHub PR for breaking changes
npx delimit-cli quickstart                       # Clone demo project + guided walkthrough
npx delimit-cli try                              # Zero-risk demo — saves governance report
npx delimit-cli demo                             # Self-contained governance demo
npx delimit-cli init                             # Guided wizard with compliance templates
npx delimit-cli init --preset strict             # Initialize with strict policy
npx delimit-cli setup

…

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [delimit-ai](https://github.com/delimit-ai)
- **Source:** [delimit-ai/delimit-mcp-server](https://github.com/delimit-ai/delimit-mcp-server)
- **License:** MIT
- **Homepage:** https://delimit.ai

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** yes
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-delimit-ai-delimit-mcp-server
- Seller: https://agentstack.voostack.com/s/delimit-ai
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.