camt053-mcp

camt053-mcp: An MCP Server for ISO 20022 Bank Statements

A Model Context Protocol server that exposes the camt053 ISO 20022 Bank Statement library as tools for AI agents and assistants — discover message types and return reasons, inspect input schemas, validate records and financial identifiers, parse incoming statements, and generate validated reversing-entry XML, all from your favourite MCP client.

Latest release: v0.0.14 — OAuth 2.1 resource-server auth (RFC 9728) on the HTTP transport, Prometheus metrics, a tamper-evident audit chain, and real-HTTP load benchmarks; 22 MCP tools over stdio or authenticated streamable HTTP, all backed by the shared camt053.services layer, for Python 3.10+. See what's new →

Contents

• Overview
• The ISO 20022 MCP Suite
• Install
• Quick Start
• Tools
• Prompts
• Resources
• Using the tools
• The camt053 suite
• When not to use camt053-mcp
• Development
• Security
• Documentation
• License
• Contributing
• Acknowledgements

Overview

The Model Context Protocol (MCP) is an open standard that lets AI agents and assistants discover and call external tools in a uniform way. camt053-mcp is an MCP server that turns the camt053 library into a set of first-class agent tools, so an assistant can read and reverse ISO 20022 camt.05x cash-management messages — the standardised bank-to-customer account reports, statements, and debit/credit notifications — directly from a conversation.

The headline capability is the one-shot reversing-entry workflow: read an incoming camt.053 statement, find the entries carrying a return reason code (e.g. AC04 Closed Account), and emit a validated reversing entry.

Every tool is a thin, typed wrapper over camt053.services — the single shared facade also used by the CLI and REST API — so all interfaces behave identically. Tools return JSON-serialisable data; on an error they return an {"error": ...} payload rather than raising.

• Website: https://sebastienrousseau.github.io/camt053/
• Source code: https://github.com/sebastienrousseau/camt053-mcp
• Bug reports: https://github.com/sebastienrousseau/camt053-mcp/issues

This package is part of the camt053 suite — a set of independently installable packages that share the camt053.services layer:

• camt053 — the core library (CLI + REST API)
• camt053-mcp — this package, the Model Context Protocol server
• camt053-lsp — the Language Server Protocol server for editors

flowchart LR
    A["MCP client<br/>(Claude Desktop, IDE, agent)"] -->|stdio| B["camt053-mcp"]
    B -->|delegates to| C["camt053.services"]
    C -->|parse + reverse + validate| D["ISO 20022 camt.053 XML"]

The ISO 20022 MCP Suite

camt053-mcp is the bank-statement flagship of four coordinated, vendor-neutral MCP servers that together cover the ISO 20022 bank-statement workflow — statement depth, whole-catalogue routing, reconciliation, and multi-format ingestion. Dependency ranges are kept aligned across the suite, so the servers co-install cleanly in a single Python environment: start with one, add the rest as your workflow grows.

Server	Scope	Surface	Install	Use it when
camt053-mcp	ISO 20022 camt.053/camt.052 bank statements: parse, validate, filter, reverse; MT940/MT942 migration; CBPR+ readiness; journal export	22 MCP tools · 4 prompts · 3 resources	pip install camt053-mcp	You work with bank-to-customer statements end to end — this package, the suite's flagship
iso20022-mcp	Unified gateway: search / describe / validate / generate / parse meta-tools routed across the pain · pacs · camt · acmt families	7 meta-tools	pip install "iso20022-mcp[all]"	You want one entry point to every message family
reconcile-mcp	Matches expected pain.001 payments against observed camt.053 entries — exact, partial, one-to-many, many-to-one, every match scored and explained	7 MCP tools	pip install reconcile-mcp	You need explainable statement/payment reconciliation

In one line each: camt053-mcp is the bank-statement flagship (deepest camt.05x surface, stdio + authenticated streamable HTTP); iso20022-mcp is the generic message toolkit (a handful of verbs over the whole catalogue); reconcile-mcp is the reconciliation workflow (did the money we expected actually arrive?); and bankstatementparser-mcp is the ingestion layer (many formats in, one transaction shape out).

The suite also includes per-family servers — pain001-mcp (credit transfer initiation), pacs008-mcp (FI-to-FI credit transfers), and acmt001-mcp (account management) — reachable through the iso20022-mcp gateway.

Install

camt053-mcp runs on macOS, Linux, and Windows and requires Python 3.10+ and pip. It pulls in the core camt053 library and the MCP SDK automatically.

python -m pip install camt053-mcp

Using an isolated virtual environment (recommended)

python -m venv venv
source venv/bin/activate        # macOS/Linux
venv\Scripts\activate           # Windows
python -m pip install -U camt053-mcp

Quick Start

For the 10-minute install → MCP client config → first conversation tutorial, see docs/quickstart.md.

Launch the server over stdio (the FastMCP default transport):

camt053-mcp

Register it with any MCP client (e.g. Claude Desktop) by adding it to the client's configuration:

{
  "mcpServers": {
    "camt053": { "command": "camt053-mcp" }
  }
}

The agent can then call the tools below to parse incoming statements and generate validated reversing entries on demand.

For a shared, multi-tenant deployment, the server can also serve streamable HTTP with mandatory bearer-token auth and optional per-request Camt053-Account tenant scoping:

CAMT053_MCP_TOKEN=<secret> camt053-mcp --transport=http --bind=0.0.0.0:8080

See Multi-tenant HTTP deployment and the deployment cookbook.

Tools

All tools delegate to the shared camt053.services layer, so they behave identically to the CLI and REST API.

Tool	Purpose
list_message_types	List the 3 supported camt.05x message types
list_return_reasons	List the ISO external return reason codes
get_required_fields	Required input fields for a message type
get_input_schema	Full input JSON Schema for a message type
validate_records	Validate flat records against a message type
validate_identifier	Validate an IBAN, BIC, or LEI
validate_statement	Validate a statement against its XSD and detect its type
convert_mt940_to_camt053	MT940 → camt.053 migration: convert legacy SWIFT MT940 statement text into a camt.053 structure
convert_mt942	MT942 → camt.052 migration: convert legacy SWIFT MT942 interim transaction report text into a camt.052 structure
check_cbpr_readiness	Flag CBPR+ Nov 2026 cliff issues in a statement
get_cbpr_cutover_date	Return the official CBPR+ cutover date (2026-11-16)
cite_rulebook	Quote a curated SEPA / CBPR+ / HVPS+ rulebook clause
list_rulebook_clauses	List the available rulebook citations (optionally filtered)
export_journal	Export statement entries as Xero BankTransactions or QBO JournalEntry payloads
list_export_journal_targets	List the accounting-platform targets export_journal supports
classify_entry	Classify a statement entry via MCP Sampling (uses the client's LLM)
list_classify_entry_categories	List the default categories classify_entry uses
get_tenant_context	Report the multi-tenant scope of the call (the Camt053-Account header on the HTTP transport; None over stdio)
parse_statement	Parse an incoming camt.05x statement into data
list_entries	List every entry across all statements (paginated)
filter_entries	Return entries carrying a return reason code (paginated)
generate_reversal	Generate a validated reversing-entry XML document

Pagination

list_entries and filter_entries accept optional offset (default 0) and limit (default None) parameters. When limit is omitted they return the full list, exactly as before. When limit is given they return a paginated envelope instead:

{"total": 42, "offset": 10, "limit": 5, "entries": [/* ... */]}

A negative offset or limit returns an {"error": ...} payload, consistent with the rest of the server's error convention.

Prompts

Prompt	Purpose
reversal_preview	Guide an agent through a safe, confirm-before-generate reversal workflow
reconcile_against_pain001	Match booked statement entries to the originating pain.001 batch on EndToEndId, surface exceptions
find_duplicate_entries	Flag exact + suspected duplicates on a statement with confidence and next-action hints
match_to_invoice_set	Match incoming credits to an AR invoice ledger (exact + remittance + partial / multi-invoice tiers)

reversal_preview takes an optional reason_code (default "AC04") and returns a four-step message template: parse the statement, preview the matching entries with filter_entries, confirm with the operator, then call generate_reversal. The other three prompts take no parameters and return a two-message user-prompt + assistant-walkthrough template the agent can replay verbatim.

Resources

Resources give an agent read-only reference context it can load without calling a tool. Each resource returns a JSON payload.

Resource URI	Contents
camt053://return-reasons	The ISO external return-reason catalog — a list of {"code", "name"}
camt053://message-types	The supported camt.05x message types — a list of {"message_type", "name"}
camt053://session/{session_id}/bank/{bic}	Templated per-(session, bank) context: parsed BIC country/kind, recommended SEPA / CBPR+ / HVPS+ rulebook clauses, Nov 2026 cutover date

Both back onto the shared camt053.services layer, so they stay in sync with the equivalent list_return_reasons / list_message_types tools. On an error they return a serialised {"error": ...} payload.

Using the tools

You can invoke the tools in-process — without a transport — straight through the FastMCP instance. This mirrors what an agent receives over stdio. The runnable version of this snippet lives in examples/mcp_tools.py.

import asyncio

from camt053_mcp.server import server

# A complete camt.053 statement with one entry returned AC04 (Closed Account).
statement_xml = """<?xml version="1.0" encoding="UTF-8"?>
<Document xmlns="urn:iso:std:iso:20022:tech:xsd:camt.053.001.14">
  <BkToCstmrStmt>
    <GrpHdr><MsgId>STMT-MSG-0001</MsgId><CreDtTm>2026-06-15T08:00:00</CreDtTm></GrpHdr>
    <Stmt>
      <Id>STMT-0001</Id><CreDtTm>2026-06-15T08:00:00</CreDtTm>
      <Acct><Id><IBAN>GB29NWBK60161331926819</IBAN></Id><Ccy>EUR</Ccy></Acct>
      <Bal><Tp><CdOrPrtry><Cd>CLBD</Cd></CdOrPrtry></Tp>
        <Amt Ccy="EUR">10000.00</Amt><CdtDbtInd>CRDT</CdtDbtInd>
        <Dt><Dt>2026-06-15</Dt></Dt></Bal>
      <Ntry>
        <NtryRef>NTRY-0001</NtryRef>
        <Amt Ccy="EUR">1500.00</Amt><CdtDbtInd>CRDT</CdtDbtInd>
        <Sts><Cd>BOOK</Cd></Sts>
        <NtryDtls><TxDtls>
          <RtrInf><Rsn><Cd>AC04</Cd></Rsn></RtrInf>
        </TxDtls></NtryDtls>
      </Ntry>
    </Stmt>
  </BkToCstmrStmt>
</Document>"""


async def main() -> None:
    async def call(name, args):
        result = await server.call_tool(name, args)
        content = result[0] if isinstance(result, tuple) else result
        return content[0].text if content else ""

    # Validate an identifier.
    print(await call("validate_identifier",
                     {"kind": "bic", "value": "NWBKGB2LXXX"}))
    # -> {"kind": "bic", "value": "NWBKGB2LXXX", "valid": true}

    # Page through the matching entries (paginated envelope).
    print(await call("filter_entries",
                     {"xml": statement_xml, "reason_code": "AC04",
                      "offset": 0, "limit": 5}))
    # -> {"total": 1, "offset": 0, "limit": 5, "entries": [...]}

    # Generate a validated reversing-entry document for the AC04 entries.
    xml = await call("generate_reversal",
                     {"xml": statement_xml, "reason_code": "AC04"})
    print(xml[:46])  # -> <?xml version="1.0" encoding="UTF-8"?> ...


asyncio.run(main())

Run it directly:

python examples/mcp_tools.py

The camt053 suite

camt053-mcp is part of a set of independently installable packages built around the camt053 library — pick whichever ones your stack needs:

Package	Role
camt053	Core library + CLI + FastAPI REST API
camt053-mcp	Model Context Protocol server (this package)
camt053-lsp	Language Server Protocol server (for editors)
camt053-writer-xlsx	Excel .xlsx writer for parsed statements
camt053-loader-mt940	SWIFT MT940 → camt.053 loader

Every tool here is a thin typed wrapper over camt053.services — the same facade the CLI, REST API, and LSP use — so all four interfaces behave identically.

When not to use camt053-mcp

• You have no MCP client. This server only makes sense paired with an MCP-aware host (Claude Desktop, the IDE plugins, an agent framework). For scripted / CI use, the camt053 CLI and REST API cover the same ground without the stdio protocol overhead.
• You need to run as a long-lived daemon without an MCP client. The server does run persistently over the streamable HTTP transport (--transport=http), but every consumer must still speak MCP JSON-RPC. For plain REST semantics, use the camt053 FastAPI service.
• You need streaming responses. Tool calls return whole values, not streams. Large statements are paginated through the existing list_entries(xml, offset, limit) envelope, not chunked over multiple responses.
• You need per-user OAuth flows brokered for you. The HTTP transport authenticates callers (OAuth 2.1 resource server with RFC 9728 metadata, or a static bearer token in dev mode) and scopes requests via the Camt053-Account tenant header, but it does not run an authorization server: bring your own IdP.
• You need to generate pain.001 outbound payment files. Out of scope; use pain001-mcp.

Development

camt053-mcp uses Poetry and mise.

git clone https://github.com/sebastienrousseau/camt053-mcp.git && cd camt053-mcp
mise install
poetry install
poetry shell

A Makefile orchestrates the quality gates (kept in lockstep with CI):

make check        # all gates (REQUIRED before commit)
make test         # pytest
make lint         # ruff + black
make type-check   # mypy --strict

Security

camt053-mcp is a thin wrapper — every tool delegates to camt053.services, where the defence-in-depth (defusedxml + xml_guard byte cap + DOCTYPE / ENTITY pre-flight) lives. Tools catch (ValueError, Camt053Error) and return an {"error": ...} envelope per the suite convention; they never propagate raw exceptions to the MCP client. Reporting practice, supported versions, and the full supply-chain posture are documented in SECURITY.md. Vulnerabilities go via GitHub Private Vulnerability Reporting, not public issues.

Documentation

• README.md — this file
• CHANGELOG.md — release notes
• SECURITY.md — disclosure + supported versions
• SUPPORT.md — how to get help
• MAINTAINERS.md — who can merge
• examples/ — runnable scripts
• glama.json — Glama directory manifest
• docs/iso20022-mcp-servers-compared.md — ISO 20022 MCP servers compared (2026)
• docs/BENCHMARKS.md — measured HTTP load benchmarks
• Glama listing: https://glama.ai/mcp/servers/sebastienrousseau/camt053-mcp

Related MCP Servers

Part of the ISO 20022 MCP Suite — open-source, Apache-2.0 licensed MCP servers for banking and financial-services AI agents:

Server	Purpose
pain001-mcp	Generate & validate ISO 20022 pain.001 payment files (v03–v12, pain.008, SEPA) with rulebook checks
pacs008-mcp	Generate, validate, parse & scheme-check ISO 20022 pacs.008 FI-to-FI credit transfers + Nov-2026 address linting
acmt001-mcp	Generate & validate ISO 20022 acmt account-management messages
noyalib-mcp	Lossless YAML 1.2 parsing, formatting & validation (Rust, 100% spec compliance)

MCP Registry

mcp-name: io.github.sebastienrousseau/camt053-mcp

License

Licensed under the Apache License, Version 2.0. Any contribution submitted for inclusion shall be licensed as above, without additional terms.

Contributing

Contributions are welcome — see the contributing instructions. Thanks to all contributors.

Acknowledgements

Built on the camt053 ISO 20022 Bank Statement library and the Model Context Protocol Python SDK.