Diff-focused review
Paste a unified diff and keep the analysis scoped to the supplied change.
AI code review for pull requests and diffs
Find issues before your code ships.
Paste a code diff and get a focused review for correctness, security, maintainability, performance, and missing tests.
No credit card required
A practical second pass before merge.
From changed lines to useful findings
Give GrepCode the change you want reviewed. It stays grounded in that diff and returns evidence, impact, fixes, and test gaps.
Severity and evidence
Prioritize findings by impact and tie each issue to concrete code evidence.
Security checks
Look for unsafe defaults, authorization gaps, leaked data, and risky boundaries.
Missing tests
Identify untested branches and turn review findings into a verification checklist.
Concrete fixes
Get concise remediation guidance without invented files or unsupported claims.
Usage controls
Track balances, API usage, and credit transactions from the same account.
A review workflow you control
GrepCode gives you a focused second opinion. Your repository, checks, and human approval remain the source of truth.
grepcode — review
$ curl https://api.grepcode.dev/v1/codex
✓ Authenticated GrepCode API key
✓ Applied model access and spend controls
✓ Forwarded a coding chat request
✓ Recorded usage in the workspace01
Paste
Add the unified diff or pull-request patch.
02
Focus
Choose correctness, security, tests, or quality.
03
Review
Read prioritized findings with evidence and fixes.
04
Verify
Run repository checks and approve the change yourself.
Review in the web workspace or API
Use the focused review workspace, or create an API key for a compatible coding client. Usage and credits stay in one account.
Docscurl https://api.grepcode.dev/v1/codex \
-H "Authorization: Bearer ck_..." \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.3-codex",
"messages": [{"role":"user","content":"Review this change"}]
}'Buy review credits only when you need them.
Six one-time credit packs. No subscription, recurring charge, or automatic renewal.
Frequently asked questions
Give the next change a careful second pass.
Create an account, paste a diff, and run your first focused AI review.
Start for free