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MCP Server

ScopeProof

io.github.davisvillelabs/scopeproof
Security Public & reachable MCP 2025-11-25

What this MCP does

Evaluates whether a proposed agent action falls within supplied authority and produces verifiable tamper-evident receipts.

Capabilities

Tools

3 tools
check_action
Check action authority
Determine whether one proposed action is within explicitly supplied authority. $0.01 stablecoin machine payment. Returns within_scope, outside_scope, or review_required plus deterministic reason codes, policy/action digests, and a tamper-evident receipt. This is scope enforcement against supplied authority, not identity verification, legal authorization, or a safety guarantee.
Read only Idempotent
Input schema 
{'type': 'object', 'required': ['authority', 'action'], 'properties': {'action': {'type': 'object', 'required': ['type', 'resource'], 'properties': {'tool': {'type': 'string', 'maxLength': 200}, 'type': {'type': 'string', 'maxLength': 64}, 'amount': {'type': 'object', 'required': ['amountMinor', 'currency'], 'properties': {'currency': {'type': 'string', 'pattern': '^[A-Z]{3}$'}, 'amountMinor': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}, 'method': {'type': 'string', 'maxLength': 12}, 'resource': {'type': 'string', 'maxLength': 1024}, 'dataClass': {'type': 'string', 'maxLength': 80}, 'destructive': {'type': 'boolean', 'description': 'Set true when the proposed action is destructive even if its action type or HTTP method is not intrinsically classified as destructive.'}, 'environment': {'type': 'string', 'maxLength': 80}, 'irreversible': {'type': 'boolean'}}, 'additionalProperties': False}, 'context': {'type': 'object', 'properties': {'humanApprovalPresent': {'type': 'boolean', 'description': 'Caller assertion that required human approval has already occurred. ScopeProof records this as caller-asserted and does not independently verify the human identity or approval event.'}}, 'additionalProperties': False}, 'authority': {'type': 'object', 'required': ['allowedActions', 'allowedResources'], 'properties': {'tools': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64}, 'methods': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 24}, 'issuedAt': {'type': 'string', 'format': 'date-time'}, 'maxSpend': {'type': 'object', 'required': ['amountMinor', 'currency'], 'properties': {'currency': {'type': 'string', 'pattern': '^[A-Z]{3}$'}, 'amountMinor': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}, 'expiresAt': {'type': 'string', 'format': 'date-time'}, 'notBefore': {'type': 'string', 'format': 'date-time'}, 'principal': {'type': 'string', 'maxLength': 160}, 'dataClasses': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 32}, 'environments': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 32}, 'deniedActions': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64}, 'schemaVersion': {'type': 'string', 'maxLength': 64}, 'allowedActions': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64, 'minItems': 1}, 'deniedResources': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64}, 'allowDestructive': {'type': 'boolean'}, 'allowedResources': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64, 'minItems': 1}, 'allowIrreversible': {'type': 'boolean'}, 'approvalRequiredFor': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 32}}, 'additionalProperties': False}}, 'additionalProperties': False}
preflight
Preflight authority envelope
Validate whether a structured authority envelope contains enough explicit constraints for ScopeProof to evaluate one action. Free. Returns no substantive authorization verdict and accepts no credentials, raw prompts, arbitrary request bodies, or secrets.
Read only Idempotent
Input schema 
{'type': 'object', 'required': ['authority', 'action'], 'properties': {'action': {'type': 'object', 'required': ['type', 'resource'], 'properties': {'tool': {'type': 'string', 'maxLength': 200}, 'type': {'type': 'string', 'maxLength': 64}, 'amount': {'type': 'object', 'required': ['amountMinor', 'currency'], 'properties': {'currency': {'type': 'string', 'pattern': '^[A-Z]{3}$'}, 'amountMinor': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}, 'method': {'type': 'string', 'maxLength': 12}, 'resource': {'type': 'string', 'maxLength': 1024}, 'dataClass': {'type': 'string', 'maxLength': 80}, 'destructive': {'type': 'boolean', 'description': 'Set true when the proposed action is destructive even if its action type or HTTP method is not intrinsically classified as destructive.'}, 'environment': {'type': 'string', 'maxLength': 80}, 'irreversible': {'type': 'boolean'}}, 'additionalProperties': False}, 'context': {'type': 'object', 'properties': {'humanApprovalPresent': {'type': 'boolean', 'description': 'Caller assertion that required human approval has already occurred. ScopeProof records this as caller-asserted and does not independently verify the human identity or approval event.'}}, 'additionalProperties': False}, 'authority': {'type': 'object', 'required': ['allowedActions', 'allowedResources'], 'properties': {'tools': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64}, 'methods': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 24}, 'issuedAt': {'type': 'string', 'format': 'date-time'}, 'maxSpend': {'type': 'object', 'required': ['amountMinor', 'currency'], 'properties': {'currency': {'type': 'string', 'pattern': '^[A-Z]{3}$'}, 'amountMinor': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}, 'expiresAt': {'type': 'string', 'format': 'date-time'}, 'notBefore': {'type': 'string', 'format': 'date-time'}, 'principal': {'type': 'string', 'maxLength': 160}, 'dataClasses': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 32}, 'environments': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 32}, 'deniedActions': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64}, 'schemaVersion': {'type': 'string', 'maxLength': 64}, 'allowedActions': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64, 'minItems': 1}, 'deniedResources': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64}, 'allowDestructive': {'type': 'boolean'}, 'allowedResources': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 64, 'minItems': 1}, 'allowIrreversible': {'type': 'boolean'}, 'approvalRequiredFor': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 32}}, 'additionalProperties': False}}, 'additionalProperties': False}
verify_receipt
Verify ScopeProof receipt
Verify the cryptographic integrity of one ScopeProof receipt without exposing the server signing key. Free and repeatable.
Read only Idempotent
Input schema 
{'type': 'object', 'required': ['receipt'], 'properties': {'receipt': {'type': 'object'}}, 'additionalProperties': False}
History

Recent tool changes

Added
verify_receipt
Sept. 28, 2026, 2:40 a.m.
Added
check_action
Sept. 28, 2026, 2:40 a.m.
Added
preflight
Sept. 28, 2026, 2:40 a.m.
Discover

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