Request and response screening
Screen incoming prompts and outgoing responses for prompt injection and sensitive-data leakage before messages reach the model or leave the workspace.
Constellation Gate AI
Constellation Gate AI is a gateway for AI agents that screens requests, redacts sensitive data, records tamper-evident activity, and can reduce token usage. Supports desktop tools, CLI routing, and SDK setup without code changes.
What Constellation Gate AI does
Constellation Gate AI is a gateway layer for AI agents and model traffic. It sits between your tools or SDKs and the model provider so requests can be screened, responses can be redacted, and activity can be recorded in a tamper-evident log.
The product is presented for teams that want to keep their existing tools and provider relationships while adding prompt-injection defense, secret scanning, spend controls, and request-level audit records. It can be used through Gate Connect for desktop tools, through a command-line connector, or by pointing an SDK at Gate’s endpoint.
Core capabilities
Secret and PII redaction
Redact credentials, PII, and PHI from outputs so sensitive content is removed before downstream tools or logs can see it.
Verifiable audit trail
Write each allowed, flagged, blocked, or redacted decision into a hash-chained audit trail anchored to Constellation Digital Evidence.
Token savings and prompt caching
Reduce token usage with lossless compression and prompt-cache-aware handling of reusable prefixes such as system instructions, tools, and conversation history.
No-code and code-based setup
Route AI tools through a desktop app or CLI without changing code, including one-click setup for supported tools and a base URL for SDKs.
Usage caps
Enforce spend, token, and rate caps at the organization, project, or API-key level to stop runaway agent loops.
Common ways teams use Gate
Protect agent workflows
Point existing agent workflows at Gate to screen prompts for injection attempts before they reach the model and to keep a record of each run.
Reduce data leakage
Use the redaction layer when models may echo back customer records, credentials, or internal notes that should not appear in logs or downstream tools.
Control spend and rate limits
Set caps at the org, project, or key level to prevent retry loops or overly expensive runs from continuing unchecked.
Route desktop AI tools
Install Gate Connect on a desktop and connect tools such as Claude Code, Cursor, Codex, or OpenCode with minimal setup.
Add controls without changing providers
Keep using an existing OpenAI, Anthropic, or other provider account while adding screening and audit records in front of it.
Pros and Cons
Pros
- Screens both requests and responses, so it can catch prompt injection on the way in and redact leaks on the way out.
- Offers multiple access paths: desktop app, command-line connector, and direct SDK routing.
- Keeps an audit trail with hash chaining and ledger anchoring for later review.
- Supports bring-your-own-keys as well as Gate-billed pay-as-you-go model usage.
- Includes spend, token, and rate caps to prevent runaway agent activity.
Cons
- Pricing is monthly and self-serve, but the source does not give a full breakdown of all usage costs or every limit by tier.
- Some setup and integration details are still light, especially around supported providers, team/workspace administration, and deployment requirements.
FAQ
Do I need a credit card to start?
Yes. The Free plan is free forever and does not require a credit card. Payment details are only needed if you upgrade to Pro or buy model usage through Gate’s keys.
How is model usage billed?
Model usage is pay as you go per token when you run models through Gate’s keys. If you bring your own provider keys, you keep paying the provider directly.
Can I keep using my existing Claude or ChatGPT subscription?
Yes. Gate can sit in front of tools like Claude Code or ChatGPT, so existing subscriptions can continue while Gate screens and records requests.
How do spend caps work?
On Pro, spend caps can be set at the organization, project, or API-key level. When a cap is reached, Gate stops the requests rather than letting them continue.
Can I cancel anytime?
Yes. Plans are monthly and self-serve, and you can downgrade to Free from the billing page. Your workspace keeps routing, logs, and the audit trail, and nothing is deleted.
Quick Facts
- Category
- AI gateway / AI agent security
- Website
- constellationgate.ai
- Primary surface
- Desktop app, CLI, and SDK gateway endpoint
- Platforms
- macOS, Windows, Linux
- Pricing shape
- Free plan; Pro at $20 per user per month; enterprise pricing by contact
- Billing model
- Monthly, self-serve; model usage is pay as you go or bring your own keys
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