xls-mcp-servers

Provides an MCP server (Python) exposing tools to read, write, create, and update Excel 97-2003 .xls (binary) files, including listing sheet names and retrieving basic spreadsheet metadata.

Evaluated Apr 04, 2026 (17d ago)

Homepage ↗ Repo ↗ Infrastructure mcp excel xls python file-io automation spreadsheets

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

No auth or transport security details are provided (likely local process). Primary risk is unconstrained file-system access unless ALLOWED_PATHS is correctly set in server.py. README mentions allowlisting, but does not document secure defaults. Spreadsheet parsing/writing dependencies are standard libraries; no vulnerability status is provided.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You need agent-driven access to legacy Excel .xls files and can safely permit file-system reads/writes from the MCP server runtime environment.

Avoid When

When you need .xlsx support, strong multi-tenant security controls, or robust, documented operational guarantees (SLA, retry semantics, rate limits).

Use Cases

• Reading tabular data from legacy .xls files in an MCP-enabled workflow
• Programmatically generating .xls reports or configuration spreadsheets
• Updating specific cells in an existing .xls workbook
• Listing workbook sheets and extracting ranges for downstream processing

Not For

• Handling modern .xlsx workbooks
• High-throughput spreadsheet processing at scale without additional orchestration
• Server-side web/API usage patterns requiring REST endpoints, auth, or quotas

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

OAuth: No Scopes: No

No authentication mechanism is described in the provided README. File access is instead controlled by an ALLOWED_PATHS allowlist in server.py.

Pricing

Free tier: No

Requires CC: No

No pricing details provided; appears to be a library/server installed from PyPI.

Agent Metadata

Pagination

none

Idempotent

False

Retry Guidance

Not documented

Known Gotchas

⚠ Only supports .xls (Excel 97-2003 binary); .xlsx will not work.
⚠ Dates are converted to strings (YYYY-MM-DD), which may affect round-tripping or type expectations.
⚠ If ALLOWED_PATHS is empty, the server may allow access to all paths—dangerous in agent contexts.
⚠ If the target file is open by Excel/another process, write/update may fail.
⚠ Complex formatting may not be fully preserved after copying/modifying with xlutils.

Alternatives

For .xlsx: an MCP server or library supporting OpenXML (.xlsx) such as openpyxl-based implementations Local-only scripting with pandas + xlrd/openpyxl (depending on file type) without MCP Generic file-processing MCP servers that provide schema-validated inputs/outputs and stronger security controls

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Scores are editorial opinions as of 2026-04-04.