{"$schema":"https://verifymcp.io/schemas/trust-report.json","schemaVersion":1,"license":{"name":"CC BY-NC 4.0","url":"https://creativecommons.org/licenses/by-nc/4.0/"},"generatedAt":"2026-11-06T16:31:25.256Z","url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark","markdownUrl":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark.md","server":{"slug":"com-spillmark-spillmark","name":"Spillmark","registryName":"com.spillmark/spillmark","description":"Free Amazon and Meta ads calculators. No brand data and no key.","registryStatus":"active","deletedAt":null,"statusMessage":null,"liveness":"live","publisher":{"class":"unknown","claimed":false}},"component":{"slug":"spillmark","type":"remote","identifier":"https://spillmark.com/mcp","withdrawn":false,"url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark","version":"1.0.0","transport":null,"scoredAt":"2026-11-06T08:34:42.117Z"},"score":{"total":74,"tier":"medium","status":"scored","weekDelta":0,"history":[{"date":"2026-11-06","total":74},{"date":"2026-11-05","total":74},{"date":"2026-11-04","total":74},{"date":"2026-11-03","total":69},{"date":"2026-11-02","total":68},{"date":"2026-11-01","total":75},{"date":"2026-10-31","total":74},{"date":"2026-10-30","total":74},{"date":"2026-10-29","total":73},{"date":"2026-10-28","total":73},{"date":"2026-10-27","total":72},{"date":"2026-10-26","total":72}]},"categories":[{"name":"Endpoint Security","score":74,"verdict":"fail","reasons":["The endpoint's TLS certificate is valid, in date, and uses a strong key.","No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation.","HTTPS is enforced; there's no plaintext access path.","HSTS check failed: the Strict-Transport-Security header is absent.","DNSSEC check failed: this domain isn't protected by DNSSEC."],"codes":[{"code":"tls.valid","args":{}},{"code":"auth.none_no_destructive","args":{}},{"code":"https.enforced","args":{}},{"code":"headers.hsts_absent","args":{}},{"code":"dnssec.absent","args":{}}]},{"name":"Transport & Reachability","score":100,"verdict":"pass","reasons":["Verified streamable-http transport via a live MCP handshake."],"codes":[{"code":"transport.verified","args":{"transport":"streamable-http"}}]},{"name":"Schema Quality & AI Usability","score":65,"verdict":"fail","reasons":["AI-judged instruction clarity (good).","Context-footprint check failed: tool/resource definitions use about 482 tokens (~160/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.","Usage-examples check failed: none of the tools include examples."],"codes":[{"code":"schema.ai_quality","args":{"band":"good"}},{"code":"schema.footprint_heavy","args":{"avg":"160","items":"3","tools":"3","tokens":"482","resources":"0"}},{"code":"schema.examples_absent","args":{}}]},{"name":"Stability & Change Management","score":37,"verdict":"partial","reasons":["Stability observed for 11 of 30 days with no destabilising changes; credit accrues until the full window elapses."],"codes":[{"code":"stability.building_history","args":{"days":"11"}}]},{"name":"Tool Coverage","score":100,"verdict":"pass","reasons":["100% of tools have a non-trivial description (not blank, and not just the tool's name).","100% of tool parameters carry a description."],"codes":[{"code":"toolquality.descriptions","args":{"pct":"100"}},{"code":"toolquality.param_docs","args":{"pct":"100"}}]},{"name":"Tool Safety","score":100,"verdict":"pass","reasons":["No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.","We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.","An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it."],"codes":[{"code":"toolsafety.injection_clean","args":{}},{"code":"toolsafety.destructive_none","args":{"tools":"3"}},{"code":"toolsafety.manipulation_clean","args":{"units":"4","judged":"4"}}]},{"name":"Capabilities","score":100,"verdict":"pass","reasons":["Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28."],"codes":[{"code":"protocol.supported","args":{"latest":"2026-07-28","version":"2025-11-25"}}]}],"inconclusive":[],"malware":[],"components":[{"slug":"spillmark","type":"remote","identifier":"https://spillmark.com/mcp","withdrawn":false,"score":74,"current":true,"url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark","markdownUrl":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark.md"}],"facts":[{"label":"Endpoint","value":"https://spillmark.com/mcp"},{"label":"Transports","value":"streamable-http"},{"label":"Auth","value":"none"},{"label":"Version","value":"1.0.0"}],"install":{"available":true,"bundleSha256":null},"tools":[{"name":"list_calculators","title":"List Spillmark's free calculators","description":"Spillmark's free Amazon and Meta ads calculators (holdout test size, brand-size MDE, geo holdout states, ad waste, Meta ROAS reality check, incremental ROAS, break-even ROAS, ACoS, TACoS, Amazon fees and profit, LTV and CAC), with each one's inputs and example values. Use run_calculator to run one.","inputs":[{"name":"q","type":"string","required":false,"description":"Filter by words in the name or summary, e.g. 'holdout' or 'fees'"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":113},{"name":"run_calculator","title":"Run a Spillmark calculator","description":"Runs one calculator from list_calculators on your numbers and returns the headline result, the supporting figures, a one-sentence reading, and a link that opens the calculator with the same inputs. Missing inputs use the calculator's example values. Enter percents as points (15 means 15%), choices as the option index.","inputs":[{"name":"currency","type":"string","required":false,"description":"Currency for money results. Default USD"},{"name":"inputs","type":"object","required":false,"description":"Input values by key"},{"name":"slug","type":"string","required":true,"description":"Calculator slug from list_calculators, e.g. holdout-test-calculator"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":122},{"name":"how_lift_is_calculated","title":"How Spillmark calculates lift","description":"Spillmark's method in brief: how a geo holdout test measures the sales Meta ads cause on Amazon, with links to the full method and a sample report on made-up numbers.","inputs":[],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":49}],"toolsTruncatedAtCapture":false,"diagnostics":{"capturedAt":"2026-11-06T08:34:42.000Z","track":"remote","endpoint":"https://spillmark.com/mcp","declaredUrl":null,"truncated":false,"tls":{"outcome":"valid","label":"Valid","version":"TLS 1.3","cipherSuite":"TLS_AES_128_GCM_SHA256","chainError":null,"certificates":[{"subject":"CN=spillmark.com","issuer":"CN=WE1,O=Google Trust Services,C=US","notBefore":"2026-10-28T17:07:01Z","notAfter":"2027-01-26T18:06:58Z","keyType":"ECDSA","keyBits":256,"isCa":false},{"subject":"CN=WE1,O=Google Trust Services,C=US","issuer":"CN=GTS Root R4,O=Google Trust Services LLC,C=US","notBefore":"2023-12-13T09:00:00Z","notAfter":"2029-02-20T14:00:00Z","keyType":"ECDSA","keyBits":256,"isCa":true},{"subject":"CN=GTS Root R4,O=Google Trust Services LLC,C=US","issuer":"CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE","notBefore":"2023-11-15T03:43:21Z","notAfter":"2028-01-28T00:00:42Z","keyType":"ECDSA","keyBits":384,"isCa":true}]},"dnssec":{"result":"insecure","label":"Not signed","name":"spillmark.com.","steps":[{"zone":".","outcome":"verified","label":"Verified"},{"zone":"com.","outcome":"verified","label":"Verified"},{"zone":"spillmark.com.","outcome":"insecure_proven","label":"Unsigned 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69)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-11-03","url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark#chg-chg_01a1a08d-f720-7eb9-863e-4862b5e8d702"},{"id":"chg_01a19b63-e74e-7d43-82fa-73976b866432","kind":"check.unverifiable","summary":"HTTPS (pass → unverified)","materiality":"security","direction":"regression","scoreDelta":null,"occurredOn":"2026-11-02","url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark#chg-chg_01a19b63-e74e-7d43-82fa-73976b866432"},{"id":"chg_01a19b63-e750-7d66-a11d-bfe89a1684c5","kind":"check.verdict","summary":"HSTS header (pass → fail)","materiality":"security","direction":"regression","scoreDelta":null,"occurredOn":"2026-11-02","url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark#chg-chg_01a19b63-e750-7d66-a11d-bfe89a1684c5"},{"id":"chg_01a19b63-e751-7c67-8272-3d073b12b3c2","kind":"score.total_changed","summary":"Trust score (75 → 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0.03)","materiality":"functional","direction":"improvement","scoreDelta":null,"occurredOn":"2026-10-27","url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark#chg-chg_01a17c7b-4958-7c1b-9c0b-35ffd3df9266"},{"id":"chg_01a17587-a198-7748-ada2-63fcfda4d3d1","kind":"score.first_scored","summary":"First indexed and scored","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-10-26","url":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark#chg-chg_01a17587-a198-7748-ada2-63fcfda4d3d1"}],"truncated":false,"feedUrl":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark/changelog.json"},"links":{"html":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark","markdown":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark.md","changelogJson":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark/changelog.json","changelogRss":"https://verifymcp.io/servers/com-spillmark-spillmark/spillmark.xml","external":[{"label":"Remote endpoint","href":"https://spillmark.com/mcp"}]}}