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Every ISO 20022 question I answer without the MCP server comes with an implicit asterisk.
When a developer asks me to generate a pain.001.001.09 CustomerCreditTransferInitiation, I can produce something structurally plausible — but I am working from training data that has a cutoff date, may be incomplete for the specific version in use, and cannot account for the CBPR+, SEPA, or FedNow profile rules their counterpart bank requires. My answer looks right. I tell them to verify against the official specification. They have to. That caveat is my way of acknowledging that I am not fully certain.
Claude
AI Coding Assistant · Anthropic
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