Proof Holdings
From ≈ $10/moActively maintained
not read yet
Use
- For
- companies and developers verifying identities, approving AI agent actions, and proving which packages they authorized
- Price
- From ≈ $10/mo€9 · pricing page, read Oct 27, 2026
- Activity
- Actively maintainedrelease 2 days ago · site updated 2 days ago
- Company
- since 2015per their About page
- Used for
- confirm a caller controls the phone number they gave
- require a named person to approve payments before they run
- state which published packages you authorized under your brand
- On the web since 2015, older than 94% of its shelfINITE Atlas
- Has an MCP server (1 in the registry)public registry →
- Publishes llms.txt, a file written for AI assistantsproof.holdings ↗
- Founded2015per their About page ↗
- HeadquartersZujūnai, LTper their site
- Certifications they stateGDPRsecurity page ↗
- Subprocessorspublishedsubprocessor list ↗
- Data processing agreementpublishedDPA ↗
- Privacy policy updated2026-10-26privacy policy ↗
- Security contactsecurity.txt
These are Proof Holdings's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.
- MCP serverholdings.proof/mcp-serververified in the MCP registry
- Stateanswers, 167 toolschecked 2026-10-27
- Address to connectapi.proof.holdings/mcp
- API docsproof.holdings/docs/apithe vendor's page ↗
- Status pagelinked from the homepagestatus.proof.holdings ↗
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
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Checks whether phone numbers and email addresses are registered on messaging, social and consumer apps, plus line type and carrier, via one API.
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Roark
Scores and tests voice AI agents on 500 audio metrics before and after production deployment.
48ActiveFrom $0.15 per use2024 - #4
CallerKitMCP · sign-in
Looks up owner names, aliases and metadata for phone numbers, names and emails through a REST API.
4ActiveFrom $119/mo - #5
Numbers OnlineMCP · open
Looks up any phone number for its carrier, location, community spam risk score and verified profile.
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withHumanMCP · sign-in
Intercepts agent tool calls, applies approval rules, and sends consequential ones to a human reviewer before they run.
1ActiveOpen source
Not it? Say what you need
betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use Proof Holdings for?
Sign in to leave a noteWhat is Proof Holdings?
Issues signed, offline-checkable proofs that a person controls a phone, email or domain, or approved an action. It is listed in the Atlas under Voice.
Who is Proof Holdings for?
companies and developers verifying identities, approving AI agent actions, and proving which packages they authorized
How much does Proof Holdings cost?
Paid plans start at ≈ $10/mo (€9/mo), per Proof Holdings's pricing page on 2026-10-27.
Do people use Proof Holdings?
Little sign of use.
Is Proof Holdings still maintained?
Actively maintained: release 2 days ago · site updated 2 days ago.
Is Proof Holdings safe?
We do not audit vendors. What Proof Holdings publishes, read 2026-10-27: GDPR stated on its security page.
What are alternatives to Proof Holdings?
In Voice, by use: ParseAPI, MobileValidate, Roark, CallerKit, Numbers Online, withHuman.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk
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