MCP Bill of Materials
A machine-readable inventory of what this server exposes and depends on: tools with their effects, transports, packages, findings and provenance (schema version 1.0). Third-party text in it is escaped. Also available from the REST API at /api/v1/servers/cd66a653-90f4-4530-9e61-f0a29150c1df/mcbom.
MCP Bill of Materials
root{21}
schema_version: "1.0"
bom_format: "squatch-mcbom"
generator{3}
name: "squatch-mcp"
classifier_version: "rules_v1@2026-10-11.1"
unicode_version: "18.0.0"
server{7}
name: "com.signupbouncer/checker"
title: "SignupBouncer"
description: "An API that checks new signups for disposable emails and repeat accounts."
version: "1.1.1"
homepage_url: "https://signupbouncer.com/docs#mcp"
source: "official_registry"
upstream_status: "active"
publisher{4}
namespace: "com.signupbouncer"
display_name: "com.signupbouncer"
type: "registry_namespace"
status: "unclaimed"
organization: null
repository: null
packages[0]
transports[1]
0{5}
kind: "remote"
type: "streamable-http"
endpoint_url: "https://signupbouncer.com/mcp"
endpoint_host: "signupbouncer.com"
auth_type: "none"
auth{3}
type: "none"
authorization_servers[0]
scopes[0]
protocol{4}
era: "legacy"
negotiated_version: "2025-11-25"
supported_versions[0]
transport_type: "streamable-http"
tools[6]
0{9}
name: "check_email"
title: "Check a signup email (and IP)"
effect: "READ"
effect_confidence: 0.933
capabilities[3]
0{2}
capability: "ACCOUNT_MANAGEMENT"
confidence: 0.785
1{2}
capability: "EMAIL"
confidence: 0.894
2{2}
capability: "PERSONAL_DATA"
confidence: 0.867
risk_severity: "MEDIUM"
fingerprint: "81d37f108f4b6e8a1f494e1548171e729afceeef2f730b35a2c37a074faf6e87"
input_schema_fingerprint: "c260de5d4cb78ba019c32e2d5ad59648b8bb7c8fe5ffa638ffdf89b4f72e7930"
annotations{5}
title: null
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
1{9}
name: "explain_reason"
title: "Explain a reason code"
effect: "READ"
effect_confidence: 0.921
capabilities[2]
0{2}
capability: "EMAIL"
confidence: 0.64
1{2}
capability: "PERSONAL_DATA"
confidence: 0.6
risk_severity: "MEDIUM"
fingerprint: "8337b6ad587d116fa1a79ffa66c2bc2ed6267e787fc0e0bf62dcb83ed9bc12b1"
input_schema_fingerprint: "a28aa0640293a75263a4167a40bbafadaf9dc13a225d2175402d8b898057f22b"
annotations{5}
title: null
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
2{9}
name: "get_rules"
title: "Read an app's rules"
effect: "READ"
effect_confidence: 0.857
capabilities[0]
risk_severity: "INFO"
fingerprint: "f357f7baae794ad2bedac15d61f0d21f71faaab66a4ddbc4b89c9fa3ace294e3"
input_schema_fingerprint: "fb77dd790b4a28819339d90bdb29aa5ba00dcf5a1684bd92a6f52b702bfce75b"
annotations{5}
title: null
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
3{9}
name: "integration_guide"
title: "Code to check signups in your stack"
effect: "READ"
effect_confidence: 0.626
capabilities[3]
0{2}
capability: "ACCOUNT_MANAGEMENT"
confidence: 0.669
1{2}
capability: "AUTHENTICATION"
confidence: 0.632
2{2}
capability: "CLOUD_INFRASTRUCTURE"
confidence: 0.522
risk_severity: "INFO"
fingerprint: "3ca9177ecfd7af87e2d61d71ab552662ba5235b3c155f852d4dfedd3f22b74d6"
input_schema_fingerprint: "647e88dc703bcb9ce91e4f3a68e153dfdd88c6cfe87c436e90c3f888fe748dcb"
annotations{5}
title: null
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
4{9}
name: "lookup_burner_domain"
title: "Look up a burner domain"
effect: "READ"
effect_confidence: 0.879
capabilities[2]
0{2}
capability: "EMAIL"
confidence: 0.844
1{2}
capability: "PERSONAL_DATA"
confidence: 0.6
risk_severity: "MEDIUM"
fingerprint: "f32158125526801c656a27e28891bcf487b4dd3fbe6cb8cb04a42b8f26025cf6"
input_schema_fingerprint: "05825be8da3a22d15120c2a98475408a0aa104fcf6811410e6c9961ed541964e"
annotations{5}
title: null
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
5{9}
name: "update_rules"
title: "Change an app's rules"
effect: "WRITE"
effect_confidence: 0.822
capabilities[2]
0{2}
capability: "MESSAGING"
confidence: 0.538
1{2}
capability: "SECURITY_CONTROL"
confidence: 0.61
risk_severity: "MEDIUM"
fingerprint: "5a06371ba7a3d9a2f96f199fa625e1d6f93baef0f7e08e26e516eb0bc9b391a2"
input_schema_fingerprint: "f3487cf5310fab18b0a236cf6649db0523de007ced04aef63cf9bfe3ee5154c9"
annotations{5}
title: null
readOnlyHint: false
destructiveHint: true
idempotentHint: true
openWorldHint: false
resources[0]
prompts[0]
extensions[0]
data{6}
privacy_completeness: "not_provided"
data_categories[0]
ai_training: null
retention_policy: null
processing_regions[0]
subprocessors[0]
external_integrations[1]
0{3}
host: "signupbouncer.com"
registrable_domain: "signupbouncer.com"
source: "transport"
findings[3]
0{6}
check_id: "SQ-REPO-MISSING"
category: "provenance"
severity: "LOW"
title: "No source repository linked"
subject_type: "server"
subject_name: null
1{6}
check_id: "SQ-SERVER-AUTH-NONE-WRITE"
category: "authentication"
severity: "MEDIUM"
title: "State-changing tools available without authentication"
subject_type: "server"
subject_name: null
2{6}
check_id: "SQ-TOOL-SENSITIVE-PATH-REFERENCE"
category: "prompt_injection"
severity: "HIGH"
title: "References credential or key locations"
subject_type: "tool"
subject_name: "integration_guide"
trust{9}
registry_namespace: "verified_upstream"
publisher_identity: "unverified"
organization: "unverified"
domain: "unverified"
repository: "not_provided"
source_provenance: "unknown"
security_scan: "findings_detected"
privacy_transparency: "not_provided"
monitoring: "active"
provenance{4}
registry_name: "com.signupbouncer/checker"
registry_content_sha256: "de8ae1cf8e4cc57452c4e60201e4ec883072bca1f656aed11e4f37bb0ff629a2"
scan_snapshot_fingerprint: "2f94c7e7ffc59a60ba4ae3277c6ee8afd5b385277faafd2329ed56ea4a4fe32d"
scanner_version: "1.0.0"
timestamps{4}
generated_at: "2026-11-15T05:38:06.563Z"
observed_at: "2026-11-06T21:20:55.45+00:00"
registry_published_at: "2026-10-16T18:13:40.933214+00:00"
registry_updated_at: null