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PromptRedTeam

What it is

PromptRedTeam scans user inputs for attacks before they reach a large language model. Its checks cover direct injection, role manipulation, zero-width injection, delimiter injection, and encoded payloads. The project describes direct-injection checks that look for override terms, conflicting instructions, and prompt structure, while role checks recognize jailbreak patterns, role-play scenarios, and bypass attempts. For hidden or encoded text, it detects zero-width characters, normalizes Unicode, analyzes Base64 and other encodings, and can decode suspicious content before rescanning it. Delimiter checks look for context-breaking markers, Markdown misuse, and structural manipulation. Applications can use the hosted API, for which the homepage demonstrates a POST request to https://api.promptredteam.com/test, or self-host the project. The live tester accepts up to 1,000 characters and allows 10 requests per minute; self-hosting provides unlimited usage. The site offers Python, JavaScript, and cURL implementation examples. Its suggested workflow is to scan inputs, then block threats or log them for review. PromptRedTeam is open source under the MIT License and is available as web, API, and self-hosted deployment. The project is free: the hosted demo is limited to 10 requests per minute, while self-hosting allows unlimited use.

For and against

For

  • Checks five listed attack categories
  • Can decode and rescan encoded text
  • Self-hosting provides unlimited usage
  • Offers Python, JavaScript, and cURL examples
  • Open source under the MIT License

Against

  • Hosted demo allows 10 requests per minute
  • Live tester input capped at 1,000 characters

The verdict

PromptRedTeam offers hosted and self-hosted ways to scan inputs before they reach an LLM. The live tester has request and character limits; self-hosting is listed for unlimited usage.

Who it suits

PromptRedTeam suits developers integrating input checks into applications that send user text to LLMs. It also suits teams that want a self-hosted option or examples in Python, JavaScript, or cURL.

Plans and prices

Open source

Free

Hosted demo: 10 requests/min · Self-hosted: unlimited usage

Every plan, in full

On the record

Attack coverage
It detects direct injection, role manipulation, zero-width injection, delimiter injection, and encoded payloads.promptredteam.com · read 8 Oct 2026
Company details
The opened maker page does not state the maker's name, headquarters, or founding year.promptredteam.com · read 9 Oct 2026
Delimiter detection
The site says it detects context-breaking delimiters, markdown abuse, and structural manipulation.promptredteam.com · read 8 Oct 2026
Detection categories
It detects direct injection, role manipulation, zero-width injection, delimiter injection, and encoded payloads.promptredteam.com · read 9 Oct 2026
Direct injection detection
The site says direct injection detection uses pattern matching for override keywords, instruction conflicts, and prompt structure analysis.promptredteam.com · read 8 Oct 2026
Hidden and encoded text
The site describes zero-width character detection, Unicode normalization, Base64 and encoding analysis, and automatic decoding and rescanning.promptredteam.com · read 8 Oct 2026
Hosted API
The site demonstrates sending text to https://api.promptredteam.com/test using a POST request with JSON.promptredteam.com · read 9 Oct 2026
Integration examples
The site provides implementation examples for Python, JavaScript, and cURL.promptredteam.com · read 9 Oct 2026
License
The homepage describes PromptRedTeam as open source under the MIT License.promptredteam.com · read 8 Oct 2026
Live testing limit
The live demo allows 10 requests per minute and accepts up to 1,000 characters in its input field.promptredteam.com · read 9 Oct 2026
Open source license
The site describes the project as open source under the MIT License.promptredteam.com · read 9 Oct 2026
Purpose
PromptRedTeam scans user inputs for prompt injection before they reach an LLM.promptredteam.com · read 9 Oct 2026
Rate limit
The live tester allows 10 requests per minute and says deploying your own provides unlimited usage.promptredteam.com · read 8 Oct 2026
Role manipulation detection
The site says role manipulation detection recognizes known jailbreak patterns, role-play scenarios, and bypass attempts.promptredteam.com · read 8 Oct 2026
Self-hosting
The site says users can self-host for unlimited usage.promptredteam.com · read 9 Oct 2026
Suggested use
The homepage suggests scanning inputs before they reach an LLM, then blocking threats or logging them for review.promptredteam.com · read 8 Oct 2026
Workflow
The site says applications can scan inputs before they reach an LLM and block threats or log them for review.promptredteam.com · read 9 Oct 2026

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