Retrieves bank account balances and transaction history via PSD2 Open Banking (TrueLayer), covering 300+ UK and European banks. Returns the account balance, ISO 4217 currency code, and up to 100 recent transactions — each with date, merchant description, amount, and category. Supports optional da...
Part of the Inferventis — Financial Data, News & Web MCP server.
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AI agents use open_banking_transactions to create or modify resources in Inferventis — Financial Data, News & Web MCP. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call open_banking_transactions repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Inferventis — Financial Data, News & Web MCP.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"open_banking_transactions": {
"limits": [
{
"counter": "open_banking_transactions_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Inferventis — Financial Data, News & Web MCP policy for all 20 tools.
These attack patterns abuse exactly the kind of access open_banking_transactions gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Retrieves bank account balances and transaction history via PSD2 Open Banking (TrueLayer), covering 300+ UK and European banks. Returns the account balance, ISO 4217 currency code, and up to 100 recent transactions — each with date, merchant description, amount, and category. Supports optional date filtering to narrow the transaction window. Use this tool when an agent needs to inspect a user's spending history, verify a payment has cleared, assess account affordability, categorise recent bank transactions, or produce a financial summary from live bank data. Do not use for payment initiation — this tool is strictly read-only. Do not use for Stripe-specific payment records, subscription billing, or failed charge investigation — use stripe_payments instead. Requires a TrueLayer access token; returns structured mock data if no token is configured.. It is categorised as a Write tool in the Inferventis — Financial Data, News & Web MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Inferventis — Financial Data, News & Web MCP server in PolicyLayer and add a rule for open_banking_transactions: 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 Inferventis — Financial Data, News & Web MCP. Nothing to install.
open_banking_transactions is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the open_banking_transactions 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 open_banking_transactions. 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.
open_banking_transactions is provided by the Inferventis — Financial Data, News & Web MCP server (https://mcp-server-295985738387.europe-west1.run.app/mcp-pay?src=registry). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 Inferventis — Financial Data, News & Web MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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