validate_iban
Validate IBAN format and check digit for international bank accounts. Parameters: iban — IBAN number to validate.
This record as markdown: /tools/com-gadgethumans-swarm-x402-middleware/validate-iban.md
What validate_iban does on X402 Middleware
AI agents call validate_iban to retrieve information from X402 Middleware without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
iban | string | Yes |
Parameters from the server's own tool schema.
Why validate_iban is rated Low
This tool only validates and checks the format of an IBAN number without creating, modifying, deleting, or executing any financial transactions. It returns validation results but does not process payments, move funds, or alter any state. Despite being on a payment middleware server, the tool itself is purely informational/read-only.
From the tool's definition Tool performs validation/checking of IBAN format and check digits with no data modification, deletion, or financial transaction execution. The description explicitly states 'Validate...check digit' which is a read-only verification operation.
Attacks that exploit this kind of access
The rule that runs validate_iban safely
PolicyLayer is an MCP gateway: it sits between your AI agents and X402 Middleware, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For validate_iban, this is the rule to start with:
validate_iban is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect X402 Middleware, apply this rule, and every validate_iban call is checked against it from then on.
Questions about validate_iban
Validate IBAN format and check digit for international bank accounts. Parameters: iban — IBAN number to validate. It is categorised as a Read tool in the X402 Middleware MCP Server, which means it retrieves data without modifying state.
validate_iban accepts 1 parameter: iban. Required: iban. The full parameter table on this page comes from the server's own tool schema.
Register the X402 Middleware MCP server in PolicyLayer and add a rule for validate_iban: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches X402 Middleware. Nothing to install.
validate_iban is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the validate_iban rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for validate_iban. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
validate_iban is provided by the X402 Middleware MCP server (@gadgethumans/x402). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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