Crypto data layer for agentsTHE DATA LAYER AI AGENTS REACH FORWHEN THEY NEED CRYPTO CONTEXT

Explore the Index — find any crypto data API

Trusted by 10,000+ users · Backed by Parity, Web3 Foundation, SNZ Capital

One integration for governance, DeFi, markets, and execution across 70+ chains, built agent-native with x402 and ready for developers with standard API keys

Why now

Agents are moving from demos to production

The next generation of crypto products needs live context, machine-paid data, and fewer one-off integrations

Agents are leaving the demo phase

Production agents now need to read on-chain context, monitor governance, and act on market signals in real time, not for a single chain but across the whole crypto stack

x402 makes machine-paid data real

Agents can now hold and spend value autonomously, and data providers that do not expose agent-native payment rails will be invisible to the next generation of products

Crypto data fragmentation is getting worse

Every new L2, every new Substrate chain, every new app-chain adds another data source to integrate, and the cost of knowing what is happening rises with every launch

What PubFi gives you

One data layer for the full agent workflow

PubFi packages the data and access patterns an agent or product needs to understand crypto context and move through a workflow

Agent workflow

Monitor

Subscan API for chain state across 70+ networks, plus DeGov API for governance and DAO activity

Decide

Insight API for real-time crypto narratives, plus DeFi API, coming soon, for market observability

Execute

x402 payment rails for agent-native transactions, with API keys, Stripe, and OKX for everything else

Discover

PubFi Index helps teams search the crypto data API landscape and route the right sources through PubFi

curl -X POST \
  -H 'Content-Type: application/json' \
  -d '{
         "row": 10,
         "page": 0,
         "order": "desc",
         "order_field": "balance"
       }' \
  https://assethub-polkadot.webapi.subscan.io/api/v2/scan/accounts

{
  "status": "idle",
  "message": "Click \"Run request\" to fetch live data"
}

Example query: top Asset Hub Polkadot accounts ordered by balance

PRODUCTION PROOF

Used where crypto context needs to be reliable.

PubFi already serves 10,000+ users across 70+ chains, with backing from teams that have built, funded, and scaled crypto infrastructure.

70+chains covered

10,000+users served

Backed by SNZ · Web3 Foundation · Parity

What makes this different

Built for agent-native crypto data from day one

PubFi is not just a bundle of endpoints, it is an access layer that gives agents and builders a reliable path from context to action

Agent-native, not retrofitted

PubFi treats x402 and machine-paid usage as first-class, not as an experimental side path, so your agent can authenticate, pay, and scale usage without a human in the loop

Deep in Polkadot, broad across crypto

We have spent years inside the Substrate ecosystem and bring that depth to every chain we cover, with production-grade quality on Polkadot and Kusama instead of a thin wrapper around someone else's indexer

An open index, not a walled garden

Even when PubFi is not the right answer, we will tell you who is, and the PubFi Index helps you find any crypto data API and route the ones you choose through us when it makes sense

Plans tuned to how you ship.

Choose access by usage shape, not generic SaaS tiers. PubFi can package usage around request budgets, agent triggers, or custom backend delivery.

Get a plan recommendation →

Plans

Find your access model

Request budget

Predictable API usage for apps and developer products.

Agent triggers

Machine-driven calls when governance, market, or chain events change.

Custom delivery

Packaged backend support for teams shipping production systems.

Start shipping

Stop stitching crypto data, start shipping agents

Get an API key today, or talk to the team about packaged backend support

Get an API key Email [email protected]