Orphograph MCP
An MCP server that anchors file SHA-256 fingerprints to the Bitcoin blockchain via OpenTimestamps. It operates locally, transmitting only hashes to the Orphograph office to generate verifiable receipts for proof of existence, supporting tools for anchoring files, folders, agent outputs, and verifying lineage.
Package and access
Local package with source-attributed installation metadata. Koskamo does not execute packages during review.
What you can do with it
- Anchor a file's SHA-256 fingerprint to Bitcoin
- Verify a receipt's calendar attestation counts
- Anchor agent output text for provenance
- List signed-in subscriber's anchored receipts
Source and maintenance
Community listingRegistry 0.1.6
- Maintenance checked
Packages and installation
Source-provided package data. Koskamo has not executed or live-probed this package.
https://github.com/Orphograph/Orphograph/releases/download/mcp-v0.1.6/orphograph-mcp-0.1.6.mcpb 0.1.6
mcpbSHA-256 supplied
https://github.com/Orphograph/Orphograph/releases/download/mcp-v0.1.6/orphograph-mcp-0.1.6.mcpb package definition
{
"version": "0.1.6",
"transport": "stdio",
"fileSha256": "f0897fec55ed78f3a7d31163f9780ebfd2b6aaa6db87d4e8b6fc764c6051e49c",
"identifier": "https://github.com/Orphograph/Orphograph/releases/download/mcp-v0.1.6/orphograph-mcp-0.1.6.mcpb",
"registryType": "mcpb",
"environmentVariables": [
{
"name": "ORPHO_API_KEY",
"description": "Optional API key issued from https://orphograph.com/account.html. Without it, anchors are subject to the free-tier rate limit (three anchors per twenty-four hours per IP). With it, the customer's subscription or Pack credits apply."
},
{
"name": "ORPHO_BASE_URL",
"default": "https://orphograph.com",
"description": "Base URL for the Orphograph API. Defaults to https://orphograph.com. Override only for testing or self-hosted instances."
},
{
"name": "ORPHO_X402_PAYER_KEY_FILE",
"description": "Optional. Path to a chmod-600 file holding the hex private key of a dedicated Base wallet with USDC. With ORPHO_X402_DAILY_CAP_CENTS set too, anchors past the free tier are paid with x402 (1 cent today). The key never leaves the machine."
},
{
"name": "ORPHO_X402_DAILY_CAP_CENTS",
"description": "Optional. The most this server may pay in one UTC day, in cents. Paying stays off unless this and ORPHO_X402_PAYER_KEY_FILE are both set."
},
{
"name": "ORPHO_X402_MAX_CENTS_PER_CALL",
"default": "5",
"description": "Optional. The most one anchor may cost, in cents. Default 5."
}
]
}Tools
Reported by the attributed source; not independently observed by Koskamo.
Let your agent find its tools
Find servers like Orphograph MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.