🚧 Project under construction — we are building in public. Features ship daily.
About For Businesses For Agents Registries Start →
Trust Infrastructure for Digital Entities

Be found by AI agents.
Get verified on TETA+PI.

Verified entities are visible in agent search.
Unverified ones don't exist in Agent Internet.

People, companies, APIs, AI models, MCP servers, agents — one registry for every digital entity.

Create your page Search entities →
registry:attested · c2pa:verified · btc:confirmed
⚠️ EU AI Act Article 50: C2PA content labeling becomes mandatory in — days
✓ Verified in 10 min ✓ C2PA + Bitcoin timestamp ✓ Agents find you first
The problem

AI agents are already searching, booking, and transacting.

But they can't verify who they're dealing with. TETA+PI closes that gap.

$7.84B
AI agent market, 2025 ↗
$52.62B
Projected 2030 · CAGR 46.3% ↗
40%
Enterprise apps with agents by 2026 ↗
13,853
MCP servers · +3,900% in 17 months ↗

Search · Negotiation · Payments: automated. Verification: ← still unsolved.

Search
✓ solved
Negotiation
✓ solved
Payments
✓ solved
Verification
← TETA+PI

Agent protocols (MCP, A2A) handle connectivity. None handle identity, verification, or provenance.

arXiv:2502 · Agent-OSI · February 2026 ↗
For everyone

Whoever you are. Prove it. Be found.

Businesses
Be found first
Registry verified. When an agent searches for what you do — it finds you first.
Journalists & Media
Your byline, proven
Verified identity and byline. Your work is provably yours — signed and timestamped.
Artists & Creators
Human-made, proven
C2PA-signed work. Prove it's human-made, not AI-generated. Verifiable at any point in time.
Entity types

One registry. Every kind of digital entity.

AI agents are the first class of entity that urgently needs verified identity — they are not the last.

👤People
🏢Companies
🏷️Brands
🌐Domains
🖥️Websites
🔌APIs
🧠AI Models
🔗MCP Servers
📦Software
📂Repositories
🤖AI Agents
⚙️Autonomous Entities
How it works

Create a page. Add blocks. TETA+PI does the rest.

1
Create your verified profile
Tell us who you are — business, journalist, artist. You become a verified entity in the registry.
2
Add your blocks
Content, documents, video — signed with C2PA and anchored on Bitcoin. No forms. No categories.
3
Get found by agents
Your profile becomes an endpoint. Agents route to you based on what people need.

No categories. No forms. No complexity.

A block can be anything: a video of your strawberry field, a quality certificate, a live kitchen stream via API.

Verification levels

The more you prove, the more agents trust you.

●○○ Level 1
Registry attested
Cross-referenced with official registries. Entity exists and is registered.
●●○ Level 2
Fully verified
C2PA signed blocks + Bitcoin timestamp. Content is real and belongs to this entity.
●●◌ Level 3
Live verified
Active PI Camera stream. Continuous proof of existence and activity in real time.

◌ = ongoing process, not a finished state. The signal is live.

Beyond identity

Prove the claim. Not just the identity.

We don't verify that a business exists. We verify that what it claims is actually true.

Sushi chef
"Traditional recipe, made fresh daily."
PI Camera films the actual preparation
C2PA + Bitcoin timestamp — real, not staged
AI checks: does the footage match the claim?
Artist
"This is my original painting."
PI Camera films the creative process
C2PA + Bitcoin timestamp — real, not staged
Linked to their verified profile
Journalist
"Real, unstaged footage."
PI Camera captures the footage live
C2PA + Bitcoin timestamp anchors the capture
Proves not staged, not AI-generated
Two checks, one block
1
Authenticity
Not AI-generated, filmed now, by this profile — C2PA + Bitcoin timestamp.
2
Claim Match
Does the footage support the claim text? AI-assisted — yes / no / partial.

Works for anyone — no legal entity required. A freelancer proves quality exactly like a corporation.

Claim matching is an AI-assisted signal, not a guarantee — every result includes a manual review and appeals path.

Search entities

Find any verified entity in the registry.

Businesses, journalists, artists. If they're verified on TETA+PI, agents can find them — and so can you.

Search →
entity:type:business entity:type:journalist entity:type:artist level:verified
The algorithm

Ranking earned through trust. Not purchased through ads.

TWIRA(entity, query) = α·T + β·I + γ·P
T
Trust Score
Verification level × recency × source weight. Registry attestation counts more than self-declaration.
I
Intent Alignment
Semantic match between the agent's query and your blocks. C2PA-signed blocks weighted higher.
P
Provenance
Bitcoin timestamp depth + C2PA chain + endpoint uptime. History cannot be bought — only accumulated.
Co-invented with our CTO. arXiv paper in preparation.
The formula is public. The registry data behind it is not.
For developers & agents

Your agent already knows how to connect.

Connect TETA+PI MCP to any agent in one line.

Claude, GPT, custom — any MCP-compatible agent works.

agent.config.yaml 
mcp_servers:
  - name: teta-pi
    url: https://mcp.tetapi.dev/sse
    auth: Bearer
teta_search
Search by name, domain, type, jurisdiction, or verification level.
teta_verify_entity
Verify any entity — business, journalist, artist — by name or ID.
teta_verify_endpoint
Verify a domain or URL against the registry and get its entity profile.
teta_get_proof
Return raw cryptographic proof — C2PA manifest + Bitcoin anchor.

Open protocol. Open-source library. MIT license. Fork it. Build on it. The Root CA stays with TETA+PI.

Full developer docs → GitHub → API reference →
No CMS? No problem

One script tag. Two levels of agent-readability.

For static pages and custom-coded sites that can't run a plugin.

index.html 
<script async src="https://tetapi.dev/tag.js" data-entity="YOUR_ENTITY_ID"></script>
Part A · script tag only

Paste one line, zero config. Injects structured data for agents and crawlers that execute JS.

Part B · + one DNS record

One CNAME/TXT record + a redirect rule at your host. Serves real /.well-known files from your domain root — works for every agent, not just JS-executing ones.

Part A alone is a partial signal — full agent-readability needs Part B.

Level 3 amplifier · PI Camera

When a verified profile isn't enough — you show it live.

PI Camera is the amplification layer for entities that need continuous proof. C2PA-signed at capture. Anchored on Bitcoin. Streamed to your verified profile.

Journalists & reporters
Shoot from the field. Every frame is signed before it leaves the phone.
c2pa:capture:signed → btc:ts:confirmed
Businesses & producers
Verify production runs, supply chain, authentic output. Connect via API.
stream:live → agent:queryable → profile:live
Artists & creators
Prove you created it — not AI. Every piece signed at creation.
human:created → not:ai:generated → c2pa:signed
Explore PI Camera →
Open protocol

We are not building an app. We are building the standard.

θ+π is a cryptographic trust protocol: registry verification + C2PA media signing + Bitcoin timestamping — accessed by AI agents via MCP.

Layer 1 · Registry
Who are they?
We query official registries — Handelsregister, GLEIF, EU VAT, DE-ÖKO — and attest the result on-chain.
registry:attested
Layer 2 · C2PA
Did they create this?
Verified entities sign their content with a cryptographic key. Any C2PA-aware tool verifies the signature — without asking us.
c2pa:verified
Layer 3 · Bitcoin
When was this proven?
Each verification record is hashed and anchored to the Bitcoin blockchain — permanent, immutable, independent of our servers.
btc:anchored
Accessed by AI agents via MCP — one call, three layers of proof.
We publish — MIT
·Protocol specification
·Open-source library
·API standard
·Impressum format
We keep
·Root CA
·Delegated CA for Enterprise
·Verification precedent dataset
·C2PA signing authority
📄 Whitepaper
Protocol spec — C2PA · BTC · Registry · MCP
⎔ GitHub
Open-source library · MIT · reference impl.
⚡ Nostr
Protocol updates · censorship-resistant
Academic evidence

The problem is formally identified. The solution does not yet exist.

arXiv:2502 · Feb 2026 Agent-OSI Reference Architecture ↗

"Verifiable execution and provenance explicitly listed as an unsolved layer in the full agent stack."

arXiv:2407 · Jul 2024 Internet of Agents ↗

"No universal agent identity system. Security varies wildly across protocols."

arXiv:2503 · Mar 2026 Trust in Autonomous Agent Networks ↗

"Cryptographic provenance is prerequisite for agent commerce at scale."

Pricing

Pay once. Verified forever.

One-time modules, no subscription. Free forever for consumers.

Free
$0
forever
✓Profile + registry check
✓C2PA via PI Camera
✓10 verified blocks
✓Agent visibility
Start free →
FOUNDING PRICE
Module #1
$25
one-time
✓Full C2PA + Bitcoin timestamps (L2)
✓+10 blocks
✓Privacy toggle per block
Lock founding price →
Module #2
$52
one-time
✓Everything in #1
✓Extended blocks
✓Integrations (LinkedIn etc.)
✓Analytics
Get started →
Enterprise
Custom
annual
✓White-label
✓Delegated CA
✓Bulk verification API
✓Live stream verification (L3)
Contact us →
Verification status is never for sale. Ranking by relevance, not payment. Free forever for consumers.
Product evolution

The registry is the first product.
The infrastructure is the company.

01 · TODAY
Entity Verification
02 · NEXT
Identity + Reputation
03 · NEXT
Discovery
04 · HORIZON
Agent Economy
05 · HORIZON
Autonomous Commerce

Without verification — you don't exist in Agent Internet.

$0 to start · $25 founding price · pay once, verified forever
Start → Search entities