Brex Corporate Card MCP Server

MCP server for Brex — the corporate card and spend management platform designed for startups and tech companies. Enables AI agents to query Brex transactions, budgets, expenses, and spend analytics. Supports finance automation workflows for startups using Brex as their primary spend management solution.

Evaluated Mar 07, 2026 (0d ago) vcurrent
Homepage ↗ Repo ↗ Other brex corporate-cards expense-management finance spend mcp-server startup
⚙ Agent Friendliness
69
/ 100
Can an agent use this?
🔒 Security
83
/ 100
Is it safe for agents?
⚡ Reliability
70
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
65
Documentation
70
Error Messages
65
Auth Simplicity
75
Rate Limits
72

🔒 Security

TLS Enforcement
95
Auth Strength
85
Scope Granularity
82
Dep. Hygiene
65
Secret Handling
82

Corporate financial data. SOC2 and PCI-DSS certified. OAuth scopes well-defined. Card operations require human oversight.

⚡ Reliability

Uptime/SLA
78
Version Stability
70
Breaking Changes
65
Error Recovery
65
AF Security Reliability

Best When

A startup or tech company using Brex wants AI agents to query spend data, monitor budgets, and generate financial reports — reducing manual finance operations.

Avoid When

You need autonomous card issuance or expense approval. FINANCIAL RISK: Corporate spend and card data requires strict human oversight for write operations.

Use Cases

  • Querying Brex transactions and spend data from finance automation agents
  • Retrieving budget utilization and department spend from financial reporting agents
  • Monitoring expense policy compliance from finance governance agents
  • Generating spend summaries and analytics from business intelligence agents

Not For

  • Autonomous expense approval or card management (requires human oversight)
  • Non-Brex corporate platforms
  • Personal expense tracking (Brex is corporate-focused)

Interface

REST API
Yes
GraphQL
No
gRPC
No
MCP Server
Yes
SDK
Yes
Webhooks
Yes

Authentication

Methods: oauth
OAuth: Yes Scopes: Yes

Brex OAuth 2.0. Multiple token types (user, team tokens). Use read-only scopes for reporting agents. Team tokens for company-wide data access.

Pricing

Model: freemium
Free tier: Yes
Requires CC: No

Brex corporate card platform is free. API access included. MCP server is community open source.

Agent Metadata

Pagination
cursor
Idempotent
Partial
Retry Guidance
Documented

Known Gotchas

  • FINANCIAL RISK: Corporate card and spend data — strict access controls required
  • Brex has multiple token types (user, team) — use appropriate scope for agent use case
  • Card management and spend limit changes require human authorization
  • Community MCP implementation — verify against current Brex API documentation
  • Brex API versioning: check for breaking changes before upgrading

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Scores are editorial opinions as of 2026-03-07.

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