# OpenAI Guardrails vs Prisma AIRS AI Runtime Security API

> OpenAI Guardrails scores 69.5 (B) on agent readiness against Prisma AIRS AI Runtime Security API's 62.8 (B), and leads in 4 of 7 scored categories. Prisma AIRS AI Runtime Security API leads on reliability and security & auth. Both do guard injection. Category scores, facts…

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- Updated: 2026-10-09

OpenAI Guardrails scores 69.5 (B) on agent readiness against Prisma AIRS AI Runtime Security API's 62.8 (B), and leads in 4 of 7 scored categories. Prisma AIRS AI Runtime Security API leads on reliability and security & auth. Both do guard injection.

- OpenAI Guardrails: grade B, 69.5/100, rank #175 of 842. Markdown https://www.anchorterminal.com/tools/openai-guardrails.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-guardrails.json
- Prisma AIRS AI Runtime Security API: grade B, 62.8/100, rank #379 of 842. Markdown https://www.anchorterminal.com/tools/prisma-airs.md · JSON https://www.anchorterminal.com/api/v1/tools/prisma-airs.json

## Which one, for what

### OpenAI Guardrails (B)

Good for: Teams already on the OpenAI client or Agents SDK that want several checks from one config file with little code.

Ahead on:
- Agent ergonomics, 73 against 65
- Payments & pricing, 60 against 0
- Maintenance & community, 89 against 31
- Transparency & trust, 76 against 71

Also in its favour:
- Open source

Watch for: By default a check that fails to run returns `tripwire_triggered=False`, so the request continues. Strict mode is opt-in

### Prisma AIRS AI Runtime Security API (B)

Good for: A company already buying Palo Alto Networks through Strata Cloud Manager that wants prompt, response and MCP tool scanning with DLP and URL filtering from the same vendor.

Ahead on:
- Reliability, 87 against 73
- Security & auth, 85 against 59

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: No public price, free tier or trial. Capacity is bought as Software NGFW credits, in steps of 1 billion tokens a month, through sales


## Score by category

| Category | Weight | OpenAI Guardrails | Prisma AIRS AI Runtime Security API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 73 | 87 | Prisma AIRS AI Runtime Security API +14 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 66 | 68 | Prisma AIRS AI Runtime Security API +2 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 65 | OpenAI Guardrails +8 |
| Security & auth | 14% (17.5 this run) | 59 | 85 | Prisma AIRS AI Runtime Security API +26 |
| Payments & pricing | 10% (12.5 this run) | 60 | 0 | OpenAI Guardrails +60 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 89 | 31 | OpenAI Guardrails +58 |
| Transparency & trust | 7% (8.8 this run) | 76 | 71 | OpenAI Guardrails +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **69.5 · B** | **62.8 · B** | |

## Facts side by side

| Fact | OpenAI Guardrails | Prisma AIRS AI Runtime Security API |
| --- | --- | --- |
| Kind | Agent framework | HTTP API |
| Vendor | OpenAI | Palo Alto Networks, Inc. |
| Hosted endpoint | no (local only) | `https://service.api.aisecurity.paloaltonetworks.com/v1/scan/sync/request` |
| Transports | HTTP | HTTP |
| Auth | API key | OAuth or key |
| Pricing | Free | Paid |
| x402 | no | no |
| Licence | MIT | Proprietary service under the Palo Alto Networks end user licence agreement. The Python SDK is under the PolyForm Internal Use licence 1.0.0, which is not an OSI licence |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2026-09-10 | 2026-05-15 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 259 stars, 19k npm/wk, 105k PyPI/wk | 10 stars, 999 PyPI/wk |

## Verdicts

**OpenAI Guardrails.** MIT-licensed wrapper that adds twelve configurable checks to OpenAI client calls from one JSON file, with tool-level injection checks for the Agents SDK. The README labels it a preview at version 0.3.3, and by default a check that fails to run is reported as passed unless `raise_guardrail_errors=True` is set.

**Prisma AIRS AI Runtime Security API.** A public OpenAPI document, ten detection types in one call, tool-call scanning, a remote MCP server, rotating API keys and OAuth roles suit teams already on Strata Cloud Manager. Access needs Software NGFW credits bought through sales, with no public price, trial or self-serve signup, and payloads flagged malicious are kept for up to 10 years.

## Before you call either

### OpenAI Guardrails

1. Pass `raise_guardrail_errors=True` to the client. The default treats a check that failed to run as passed
2. Run `python -m spacy download en_core_web_sm` before using Contains PII, or client initialisation fails
3. Catch `GuardrailTripwireTriggered`, and append a user message to history only after the call returns without it
4. Use `block=true` for Contains PII in the output stage. Masking works only in the pre-flight stage
5. Keep `stream=False` where output must be checked before it is shown, and budget one extra model call per LLM-based check

### Prisma AIRS AI Runtime Security API

1. Send `x-pan-token` and an `ai_profile` with `profile_name` or `profile_id` on every scan. Both come from Strata Cloud Manager, and a key works only in its own region
2. Put earlier turns first in `contents`. Only the last element is scanned, and the rest is context
3. Read `action` (allow or block) and `category`, then check `timeout` and `error`, because a detector that failed is reported in `errors` with a 200
4. Keep synchronous requests under 2 MB and asynchronous ones under 5 MB and 25 items, and fetch at most 5 scan or report IDs a call, 10 calls a minute
5. For MCP, connect to `/mcp` on the regional host with `x-pan-token` and `x-pan-profile` headers, and call `pan_inline_scan` yourself before and after generation

## Questions

### Which is better for AI agents, OpenAI Guardrails or Prisma AIRS AI Runtime Security API?

OpenAI Guardrails scores 69.5 (B) on agent readiness against Prisma AIRS AI Runtime Security API's 62.8 (B), and leads in 4 of 7 scored categories. Prisma AIRS AI Runtime Security API leads on reliability and security & auth.

### Can an agent call OpenAI Guardrails and Prisma AIRS AI Runtime Security API without installing anything?

No hosted endpoint is listed for OpenAI Guardrails. Prisma AIRS AI Runtime Security API has a hosted endpoint at https://service.api.aisecurity.paloaltonetworks.com/v1/scan/sync/request.

### Are OpenAI Guardrails and Prisma AIRS AI Runtime Security API open source?

OpenAI Guardrails is open source (MIT). No open-source release is listed for Prisma AIRS AI Runtime Security API.


## For agents

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- Each listing in full: https://www.anchorterminal.com/api/v1/tools/openai-guardrails.json and https://www.anchorterminal.com/api/v1/tools/prisma-airs.json

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