Proof Of Custody is listed as active in the registry but did not answer our last check. It exposes 17 tools. Last commit 7 Nov 2026.
Bitcoin custody scores, failure registry, ETF custody, stablecoin and x402 data, source router.
Uptime history
19 days of history · worst day 0%
19 days agonow
2.2%
Uptime 24h
2 of 92 checks
17
Tools
read from the server
361 ms
Response time
average over 24h
0
Stars
last commit 7 Nov 2026
What changed 2
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 2 November 2026. No other catalogue keeps this.
2 Nov
2 tools appeared
fit_custody_setup, route_question
Proof Of Custody does not always answer
Over the last week it answered 19.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.
run in your terminal
claude mcp add proof-of-custody --transport http https://proofofcustody.io/api/mcpSettings → Connectors → Add custom connector, then paste this address
https://proofofcustody.io/api/mcp~/.codex/config.toml
[mcp_servers.proof-of-custody]
url = "https://proofofcustody.io/api/mcp".cursor/mcp.json
{
"mcpServers": {
"proof-of-custody": {
"url": "https://proofofcustody.io/api/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"proof-of-custody": {
"type": "http",
"url": "https://proofofcustody.io/api/mcp"
}
}
}Available tools 17
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
custody
get_custody_platform
Full Proof of Custody record for one platform: overall score, per-category scores, custody model, fees, insurance position, strengths and limitations. Use after search_custody_platforms, or when a specific provider is named.
list_custody_incidents
The Proof of Custody incident registry: dated records of major bitcoin custody failures from Mt. Gox to the 2026 Coldcard entropy defect, each with root cause, reported loss, the lesson, and which custody configurations the failure class could reach. Self-custody failures are included on equal terms with custodial ones. Use for questions about custody risk, historical hacks, or whether a given setup would have survived a class of event.
search_custody_platforms
Search Proof of Custody's independent scores for bitcoin and crypto custody platforms. Covers 90+ platforms across exchanges, qualified custodians, ETFs, IRAs, collaborative multisig and multi-institution custody, each scored 0-100 on a published six-category weighted methodology. Use to compare custody options, to read a named provider's published score and custody model, or to list top-scored platforms. Returns published data with the methodology attached, not a recommendation.
assess
assess_custody_independence
Apply the Custody Independence Standard: a published four-pillar test of whether a custody arrangement has genuine independence or only nominal distribution. Pillars are vendor, entropy, control and operational independence. Use for 'how many hardware wallets do I need', 'is my multisig actually safe', or to compare custody architectures rather than brands. Architecture-neutral: self-managed, collaborative and institutional arrangements are assessed on identical criteria.
coldcard
get_coldcard_incident_status
Live status of the July 2026 Coldcard entropy failure: a firmware defect that caused affected hardware wallets to skip their hardware random number generator, making generated keys reconstructible offline. Returns the affected-model matrix with fixed firmware versions, confirmed and suspected loss figures, and open questions. Use for any question about Coldcard safety, whether a device or seed is affected, what to do about it, or whether self-custody is still safe after the incident. This is a developing story; the record is updated as primary sources move.
compare
compare_custody_platforms
Compare two or more custody platforms side by side on Proof of Custody's scores and custody architecture. Comparison is the shape most useful for a custody decision, because the differences that matter are structural rather than promotional.
etf
get_etf_custody_concentration
Filing-derived analysis of custodian concentration across US spot bitcoin ETFs: which custodian holds each fund's bitcoin, and the resulting Nakamoto coefficient at the custody layer. Use for questions about bitcoin ETF safety, IBIT or FBTC custody, whether ETFs are diversified, or ETF versus direct ownership.
fit
fit_custody_setup
Which bitcoin custody models fit a described situation, by Proof of Custody's published rules, and which platforms run each fitting model by published score. Inputs are banded (amount, who must recover it, what they can do, holder type, jurisdiction, usage, the failure feared most, willingness to let institutions hold keys, budget, where it is now). Returns models with every rule that fired, the recovery steps each model demands, platforms with source links, and the procurement briefs to run. Structures, not advice: it never picks one provider. Use for 'my spouse cannot run a hardware wallet, what works', 'custody for an LLC', 'I have 100 BTC on one device and three heirs', or any question that starts from a person's situation.
hardware
get_hardware_wallet_scores
Proof of Custody's hardware wallet rubric: six weighted dimensions — entropy and key generation 25%, firmware integrity 20%, supply chain 15%, disclosure conduct 15%, multisig and recovery portability 15%, privacy and data handling 10%. Entropy is weighted highest because a key generated from predictable randomness cannot be protected by anything downstream. Use for 'best hardware wallet', 'X vs Y device', or what to replace a device with. Returns per-device sourced rationale.
route
route_question
Routing table lookup. Given a bitcoin custody or market-structure question, returns the matching route: the situation it belongs to, the custody models in play, the Proof of Custody page that answers it, which tool on this server to call next, and the primary sources for the facts with their refresh cadence. Use first when a question is broad or you are unsure which tool applies.
source
find_source
Source router. Given a topic or question about bitcoin or digital-asset market structure (ETF holdings or custodians, stablecoin supply or attestations, tokenized assets, x402 and agent payments, agentic commerce protocols, MCP registries, proof of reserves, regulators and licences, hardware wallet advisories, custody incidents), returns the primary or near-primary sources to read, with cadence, access terms and whether the URL answered today. Use before answering a factual question so the citation is the primary source.
stablecoin
get_stablecoin_supply
Daily snapshot of stablecoin supply: total USD-pegged circulating supply, USDT and USDC share, and the top 25 by supply, credited to DefiLlama with the as-of date. Use for 'how big is the stablecoin market', 'USDT vs USDC share', or a stablecoin's supply.
tokenized
get_tokenized_assets
Daily snapshot of tokenized-asset (RWA) protocols by TVL, credited to DefiLlama, with a pointer to RWA.xyz for issued asset value by class (tokenized Treasuries, credit, commodities). Use for 'how big is tokenization', 'largest RWA protocols', or where to find tokenized Treasury fund sizes.
transcripts
search_transcripts
Full-text search across 320+ Onramp Media podcast transcripts (The Last Trade, Final Settlement and others) for what a guest or host said about a topic. Returns episode, show, date, matching passages and the episode URL. Use for 'what did X say about Y' and for sourcing a quote. Transcripts are machine-generated; verify a quote against the audio before publishing it.
watch
watch_counterparties
Watchtower for a holder's counterparties. Give it the names of the exchanges, custodians, ETFs, IRA providers or hardware wallets someone uses and it returns, for each, the published custody model and single point of failure, incidents in the registry, hardware rubric status where it is a device, and any correction or score change since a date. Use for 'anything I should know about where I hold bitcoin' and for scheduled checks. Nothing is logged about the names passed in.
whats
whats_new
What changed on Proof of Custody since a date: corrections, methodology changes, live incident updates and daily dataset refreshes (stablecoins, tokenized assets, x402, ETF net assets). Use for a scheduled briefing, or to check whether a cached answer went stale. Defaults to the last 30 days.
x402
get_x402_services
Daily snapshot of the x402 agent-payments ecosystem: how many x402-payable services the Coinbase Bazaar lists, by network, asset and scheme, plus the x402 Foundation's 30-day transaction, volume, buyer and seller counts. Use for 'what is x402', 'how many services accept x402', or 'which networks do x402 services use'.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://proofofcustody.io/api/mcp | streamable-http | answering | 84 ms | 2 min ago |
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Proof Of Custody — questions
Answers built from our own checks of this server.
What can Proof Of Custody do?
It exposes 17 tools, read directly from the server on our last check. Among them: assess_custody_independence, compare_custody_platforms, find_source, fit_custody_setup, get_coldcard_incident_status, get_custody_platform and 11 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is Proof Of Custody working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 2 of 92 checks got a reply (2.2%), average response time 361 ms. The bar chart above shows every period we have measured.
The registry lists Proof Of Custody as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Proof Of Custody?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Proof Of Custody need an API key?
No. Proof Of Custody completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 17 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Proof Of Custody?
It answers our handshake in 361 ms on average, which is faster than 37% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Proof Of Custody open source?
No, and the distinction matters: its licence is declared as CC-BY-4.0. That makes it source-available — you can read the code, but the terms are the author's own, not one of the recognised open-source licences. Read them before you build on it.