MCP S3 Server

v1.0.0

Community

MCPstorageawsmcpmodel-context-protocol
78
Strong
About This MCP

Community-maintained MCP server for AWS S3 storage operations. Enables AI models to upload, download, list, and manage objects in S3 buckets. Includes support for multipart uploads, object metadata, and bucket operations. Essential for AI-powered cloud storage management and data pipeline workflows.

Last Evaluated: November 9, 2025
Official Website

Trust Vector Analysis

Dimension Breakdown

🚀Performance & Reliability
+
upload reliability

Upload success rate testing

Evidence
AWS S3 APIBuilt on reliable AWS S3 API with 99.99% durability SLA
highVerified: 2025-11-09
download performance

Download speed testing

Evidence
S3 PerformanceHigh-speed downloads from globally distributed S3 infrastructure
highVerified: 2025-11-09
large file handling

Large file transfer testing

Evidence
S3 Multipart UploadSupports multipart uploads for large files up to 5TB
mediumVerified: 2025-11-09
listing performance

Listing performance testing

Evidence
S3 List ObjectsPerformance degrades with large buckets; pagination recommended
mediumVerified: 2025-11-09
error recovery

Error handling testing

Evidence
AWS SDKAWS SDK provides automatic retry with exponential backoff
highVerified: 2025-11-09
🛡️Security
+
authentication security

Authentication mechanism review

Evidence
AWS IAMUses AWS IAM credentials with fine-grained permissions
highVerified: 2025-11-09
credential exposure risk

Credential security analysis

Evidence
MCP Security ModelAWS access keys stored locally; AI can perform S3 operations
highVerified: 2025-11-09
bucket policy enforcement

Policy enforcement testing

Evidence
S3 Bucket PoliciesRespects S3 bucket policies and IAM permissions
highVerified: 2025-11-09
object deletion risk

Destructive operation testing

Evidence
Security AnalysisAI can delete objects and empty buckets if IAM permits
highVerified: 2025-11-09
public access risk

Access control testing

Evidence
S3 Public AccessCan modify ACLs and make objects public if permissions allow
mediumVerified: 2025-11-09
audit logging

Audit logging review

Evidence
S3 Server Access LoggingComprehensive logging via S3 access logs and CloudTrail
highVerified: 2025-11-09
🔒Privacy & Compliance
+
object content exposure

Data flow analysis

Evidence
MCP Data FlowDownloaded object content and metadata sent to LLM provider
highVerified: 2025-11-09
metadata privacy

Metadata privacy assessment

Evidence
Privacy AnalysisObject metadata including tags and user-defined metadata exposed
mediumVerified: 2025-11-09
bucket structure exposure

Structure privacy assessment

Evidence
Privacy AnalysisBucket names and object keys may reveal organizational structure
mediumVerified: 2025-11-09
third party data sharing

Data sharing analysis

Evidence
LLM Provider PoliciesObject content shared with LLM provider per their privacy policy
highVerified: 2025-11-09
encryption support

Encryption support assessment

Evidence
S3 EncryptionSupports server-side and client-side encryption but data decrypted for AI
highVerified: 2025-11-09
👁️Trust & Transparency
+
documentation quality

Documentation completeness review

Evidence
S3 MCP DocsGood documentation but community-maintained with evolving coverage
mediumVerified: 2025-11-09
operation visibility

Logging and traceability assessment

Evidence
AWS CloudTrailAll operations logged in CloudTrail and MCP logs
highVerified: 2025-11-09
open source transparency

Source code review

Evidence
GitHub RepositoryOpen source community implementation
highVerified: 2025-11-09
api coverage clarity

API documentation review

Evidence
MCP Server DocumentationClear but incomplete documentation of supported S3 operations
mediumVerified: 2025-11-09
⚙️Operational Excellence
+
ease of setup

Setup complexity assessment

Evidence
Setup DocumentationRequires AWS credentials and appropriate IAM permissions
highVerified: 2025-11-09
transfer performance

Performance benchmarking

Evidence
S3 Transfer AccelerationHigh-speed transfers with optional transfer acceleration
highVerified: 2025-11-09
reliability

Reliability analysis

Evidence
S3 DurabilityBuilt on S3's 99.999999999% durability SLA
highVerified: 2025-11-09
operation coverage

Feature coverage assessment

Evidence
S3 MCP ServerCovers upload, download, list, delete, and metadata operations
highVerified: 2025-11-09
community support

Community support assessment

Evidence
GitHub CommunityCommunity-maintained with moderate activity
mediumVerified: 2025-11-09
Strengths
  • +Built on highly reliable AWS S3 with 99.999999999% durability
  • +Comprehensive S3 operations (upload, download, list, delete, metadata)
  • +Excellent for cloud storage automation and data pipelines
  • +Full operation auditability through CloudTrail
  • +Open source community implementation
  • +Supports multipart uploads for large files up to 5TB
Limitations
  • !Downloaded object content and metadata exposed to LLM provider
  • !AI can delete objects and modify ACLs within IAM permissions
  • !AWS access keys and credentials accessible to AI
  • !Object metadata and bucket structure may reveal sensitive information
  • !Can make objects public if IAM permissions allow
  • !Encrypted data decrypted before transmission to LLM provider
Metadata
license: MIT
supported platforms
0: All platforms with Node.js/Python
programming languages
0: TypeScript
1: Python
mcp version: 1.0
github repo: https://github.com/modelcontextprotocol/servers
api dependency: AWS SDK for JavaScript/Python
authentication: AWS IAM credentials (Access Key ID, Secret Access Key)
first release: 2024-11
maintained by: Community

Use Case Ratings

code generation

Good for generating S3 integration code and storage workflows

customer support

Useful for managing customer file uploads and support attachments

content creation

Good for managing media assets and content delivery

data analysis

Excellent for data pipeline automation and ETL workflows

research assistant

Useful for managing research data and document archives

legal compliance

Risk of exposing confidential documents; requires strict IAM controls

healthcare

Risk of exposing PHI in stored files; requires careful controls

financial analysis

Moderate risk for financial document storage

education

Excellent for teaching cloud storage and data pipeline concepts

creative writing

Good for managing writing projects and manuscript storage