DataContractGate

Infer, dry-run, deploy, and inspect DataContractGate semantic data contracts.

Connector by nightmoose · GitHub account verified by the MCP Registry

IndexedMITLocal (stdio)★ 4

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Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/nightmoose-contractgate

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Infer, dry-run, deploy, and inspect DataContractGate semantic data contracts.

Reviews

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Permissions

What this server can do and what it asks for, from its tool list, install config and code. Checked Oct 25, 2026.

Tools: 3 read · 2 write · 1 delete
Secrets: 1 (API keys, tokens or passwords)
Install scripts: None found
Runs as: Node.js package

Tools by what they do 6

Read from the source code; the running server may list different tools.

Read 3 · Look things up without changing anything.

get_quarantine
infer_contract
list_contracts

Write 2 · Create, change, send or run things.

egress_validate
validate_events

Delete 1 · Delete, drop, revoke or wipe things.

deploy_contract

Secrets and settings it asks for

Secrets: values you paste in that let it act as you.

CONTRACTGATE_API_KEY

Other settings (environment variables or headers).

CONTRACTGATE_BASE_URL

Network hosts it talks to 3

api.datacontractgate.com · found in code
app.datacontractgate.com · found in code
github.com · found in code

Files it touches

Any path the agent passes to its tools

Tools (6)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

deploy_contractDeploy a contract to stablecan change or delete data
POST /contracts/deploy — find-or-create by name, insert YAML as stable, deprecate prior stable. 409 if that (name, version) exists: bump version in the YAML. Refused while quarantine is pending. Save the returned contract_id.
egress_validateValidate an outbound payload
AISchemaGate structured-output check. POST /egress/{contract_id}. dry_run defaults true — no audit row or quarantine. Returns 200/207/422 so you can read min, max, pattern, enum, and compliance_mode violations and run a bounded auto-repair. Forward response.payload only — never the original body after a block or fail.
get_quarantineList quarantined eventsread-only
GET /quarantine — rejected events for the caller's org, newest first, with violation details.
infer_contractInfer a contract from sample eventsread-only
Generate draft DataContractGate YAML from real JSON sample events via POST /contracts/infer. Does not persist. Review and write the YAML to contracts/<name>.yaml before deploying.
list_contractsList contractsread-only
GET /contracts — identities the API key can see.
validate_eventsValidate events against a contract
Validate events. Pass contract_id to hit POST /v1/ingest/{id} (dry_run defaults true — no audit, quarantine, or usage). Pass yaml_content to hit POST /playground/validate per event (never persists). Exactly one of contract_id or yaml_content. 207/422 responses are returned as data so you can apply each violation's suggestion.

Signals

Stars: 4
Forks: 0
Open issues: 1
Weekly downloads: 54
Last commit (this folder): Oct 23, 2026 (8 days ago)
Last release: Oct 13, 2026 (17 days ago)
Last package publish: Oct 13, 2026 (17 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name: io.github.nightmoose/contractgate
Version: 0.4.0
Auth: API key
Packages: npm @nightmoose/contractgate-mcp-server
License: MIT
Repository: github.com/nightmoose/contractgate
Website: app.datacontractgate.com/mcp-reference.md
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: Official MCP Registry github-graphql

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Cite this page

DataContractGate MCP server. Agent Mart. https://agentmart.dev/connectors/nightmoose-contractgate (last updated 2026-10-24)