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Let's talk ISO 8583.

Whether you're wiring iso8583sim into a payment switch, wrestling with a tricky network dialect, or just have a question about a field — reach out. A real person reads every message.

Where to reach us

Setup & customization

Help getting iso8583sim into your stack, or a custom integration for a specific network or message flow.

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Bugs & feature requests

Found something broken or missing? Opening an issue is the fastest path to a fix or a considered "no".

GitHub issues ↗
Questions & usage

Not sure how to model a message, decode a bitmap, or handle a field? The docs cover most of it.

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Security

Found a vulnerability? Please disclose it responsibly by email rather than a public issue, and we'll get on it.

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Maintained by Subhadip Mitra · GitHub