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TurboDex.
Search built for agents that pay per query.

A high-performance index and search API designed for the AI agent economy. Free tier is open. Premium endpoints are x402-gated, settled in stealth USDC via the Pakana protocol. No API keys, no rate limit tables, no identity exposed by either side.

Standard: x402 micropayments Settlement: Stellar USDC Privacy: Stealth payments Throughput: Sub-second queries

The agent economy needs payment-native APIs

AI agents are the fastest-growing category of API consumers. They cannot click through OAuth flows, cannot manage credentials in a password manager, cannot read pricing pages. They can pay. The web has no native way for an autonomous program to pay for an HTTP request — until x402.

TurboDex is built x402-native from the first endpoint. An agent that needs a semantic search result sends an HTTP GET; the server responds with HTTP 402 Payment Required and a quote denominated in USDC; the agent's Pakana wallet generates a stealth payment and a Groth16 proof; the proof is verified on Stellar Mainnet; the search response is returned. End to end, sub-second. No account creation. No API key rotation. No agent doxxing itself to the search service.

What TurboDex indexes

Free tier

Open web search

Standard keyword and metadata search across the indexed public web. Rate-limited per IP, no payment required, no privacy guarantees beyond standard HTTPS. Useful for prototyping, not production agent workloads.

Premium

Semantic search

Vector-based semantic search across the same corpus. Per-query pricing in USDC, paid via stealth payment. The search service does not link queries to a paying identity — only to a one-shot stealth address.

Premium

Real-time crawl

On-demand crawl and parse of a target URL with structured extraction. Per-URL pricing. Useful for agents that need fresh data outside the index window.

Premium

Stellar ledger search

Full-text and structured search over Stellar Mainnet transactions, contracts, and Soroban events. Per-query pricing. Built for agents and analysts working with on-chain data.

How payment works

x402 over HTTPS, settled in Stellar USDC, verified by the Pakana protocol.

GET /v1/semantic?q=zero-knowledge+payments HTTP/1.1
        Host: api.turbodex.ai

        HTTP/1.1 402 Payment Required
        WWW-Authenticate: x402 realm="turbodex.ai" amount="0.01 USDC"
        facilitator="https://facilitator.pakana.net"

        # Agent pays via Pakana stealth payment, retries:

        GET /v1/semantic?q=zero-knowledge+payments HTTP/1.1
        Host: api.turbodex.ai
        Authorization: x402 proof=<groth16 proof of stealth payment>

        HTTP/1.1 200 OK
        Content-Type: application/json
        { "results": [ ... ] }

The TurboDex server forwards the proof to the Pakana x402 facilitator, which verifies it on-chain via PakanaTracker. If the proof is valid and the payment matches the quoted price, the response is returned. Latency is dominated by Stellar's 5-second finality, with proof verification adding less than 100ms.

Why this matters

An agent paying per request never holds a long-lived API key — there is nothing to steal, rotate, or revoke.
The search service receives payment without learning the agent's identity, parent application, or wallet address.
Pricing is set per-endpoint by the operator and discovered programmatically — no pricing page to keep in sync with reality.
Settlement is on a public ledger; both sides have cryptographic receipts.
The same x402 plumbing works for any HTTP endpoint, not just search — TurboDex is the reference implementation, not the only application.

Query the index

TurboDex public endpoints are free. Premium endpoints — semantic search, full-text indexing, real-time crawl — are x402-gated. Get an -access wallet and start querying.

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