Check CLABE formatting
Check an 18-digit CLABE checksum locally before starting an account verification.
Input
An 18-digit CLABE, optionally separated by spaces or hyphens.
Result
structure_valid, checksum_valid and institution code. No live bank query or account-ownership assertion.
Scope
A correct checksum does not prove that an account exists, can receive funds or belongs to a person.
Try locally
The value stays in this browser. No request or telemetry is sent by this form.
{
"structure_valid": true,
"checksum_valid": true,
"institution_code": "032",
"scope": "checksum_only",
"account_exists": null,
"ownership_verified": false,
"network_calls": 0,
"charged": false
}Price and access
No account or credit required for these local utilities.
Connect your assistant
python3 -m venv .venv
.venv/bin/python -m pip install "gridzen-developer-kit>=0.7.0"
.venv/bin/gridzen tools --product clabe-format
.venv/bin/gridzen setup --client codex --product clabe-format --project .
# Apply after reviewing the preview:
.venv/bin/gridzen setup --client codex --product clabe-format --project . --applyCodex · Claude · Cursor · VS Code · Copilot · Gemini · Cline · Roo Code · OpenCode