Verifiable indexing
Index any chain — and verify the indexing itself. On Ethereum the pipeline is proven end to end: complete, correct, and on-chain. Check it in the browser, a Lambda, or an enclave.
Now in early access
Data you can prove.
Index any chain. Store any record. Serve any file. Every step backed by a cryptographic proof.
What we're building
Every byte comes with a proof.
Modern apps, audits, and AI agents all rely on data they can't independently verify. Indexers act as trusted middlemen, off-chain databases drift from the chains they describe, and files served from a CDN tell you nothing about provenance.
Willow makes verification first-class. One unified protocol ships with native blockchain indexing, structured-data storage, and file storage — and every read returns a cryptographic proof that travels with the data.
No trusted indexer. No invisible transformations. Just data, with the receipts to back it up.
Three first-class spokes
One protocol, every kind of data — all provable.
Storage and verification aren't bolt-on services. They're built into the protocol, exposed through one set of SDKs, and addressable from any client that can verify a proof.
Structured data
Store SQL-shaped records under your own subgrove. Schemas, queries, and updates are all signed by the chain.
File storage
Upload anything — chunked, content-addressed, Merkle-verified on download. Storage nodes stake and prove availability.
Supported chains
Index any chain. We start here.
One indexer, many chains. Every block we ingest is committed, provable, and queryable from the same SDK — wherever it came from.
- Ethereum
- Solana
- BNB Chain
- Polygon
- Arbitrum
- Optimism
- Base
How it works
Index, query, verify.
Willow proves the indexing pipeline itself — events captured completely, transformed correctly, and provably on the source chain — and your client checks the proofs locally. No trusted indexer in the path.
- 01
Index
Register a subgrove pointing at a contract. Willow's indexers continuously decode blockchain events into structured rows.
- 02
Query
Call the SDK with a subgrove ID and filter. Same shape as a normal database query.
- 03
Receive
Willow returns the matching rows plus the proofs that back them, down to the source chain.
- 04
Verify
Your client checks the math locally. If anything's off, the proof fails. Otherwise the data is provably authentic.
import {
WillowClient,
verifyQueryResponse,
} from '@willow/sdk';
const client = new WillowClient({
apiUrl: 'https://api.willow.tech',
});
// Query a subgrove — proof attached
const result = await client.data.query('yieldnest-vaults', {
filter: { vault: '0xa1b2...' },
include_proof: true,
});
// Verify locally — no trusted indexer
const { valid } = await verifyQueryResponse(result);
console.log(valid ? result.data : 'proof failed');Where it matters
Built for data that needs to hold up.
DeFi, compliance, AI — anywhere a wrong number, a missing record, or a mutated file is a real problem.
01 / DeFi & on-chain analytics
Audit data without trusting the dashboard.
Stop copying numbers from a black-box indexer. Every chart, every aggregate, every TVL figure can ship with the proof of the events it was computed from.
02 / Compliance & enterprise
Logs that can’t be rewritten.
Long-horizon retention with cryptographic provenance. Build audit trails regulators can verify and counterparties can rely on, without re-running the pipeline.
03 / AI agents
Memory and tools agents can prove.
Agents working with money, identity, or compliance need data they can stand behind. Willow gives them verified state, signed records, and content-addressed files out of the box.
In production
Live with our first partner, YieldNest.
yieldnest.willow.tech is a verified analytics dashboard for the YieldNest protocol — every chart, every TVL number, every vault stat is backed by indexed events you can audit yourself.
Want a dashboard like this for your protocol or treasury? We partner with teams to spin up Willow-verified dashboards on your own subdomain — your data, our verification stack.
Willow verifiedGet involvedBuilders Community Partners
Build with us, talk to us, or partner with us.
Willow is in active development with a live devnet, a working dashboard, and a growing community. Pick the door that fits.
Open the Dashboard
Spin up a subgrove on devnet, point our indexers at any chain or contract, and verify the proofs in your browser. Pay-per- subgrove during devnet — everything else is free.
DashboardJoin the Discord
Early users, contributors, and partners hang out in our Discord. Ask questions, share what you're building, and get direct access to the team.
Join DiscordRequest a call
Working with protocols and teams that want verified dashboards, custom indexing, or dedicated infrastructure on Willow. Bring your data, we'll help you ship.
Request a callor email info@willow.tech