Public endpoint overview

The Syncro Sender public endpoint is a tip-gated access point intended to allow developers to submit Solana transactions through Syncro Sender's multi-path routing infrastructure without an API key and without registration in many cases, subject to applicable terms and restrictions.

The only requirement is including a minimum tip of 0.0001 SOL in the transaction, directed to P2P.org's designated wallet address. If the tip is present and the request is a valid sendTransaction call, the transaction proceeds to multi-path submission.

What the public endpoint supports

The public endpoint handles sendTransaction requests only. Other JSON-RPC methods (such as getBalance, getAccountInfo, or getSlot) are not supported on the public endpoint. For those operations, the private dedicated endpoint is needed.

Rate limit: 1 request per second per IP address.

How it works

Step 1: The incoming request is verified as a sendTransaction call. Any other request type is rejected.

Step 2: The transaction is checked for the minimum tip amount (0.0001 SOL). If the tip is missing or below the threshold, the request is rejected.

Step 3: If both checks pass, the transaction proceeds to multi-path submission through Syncro Sender's routing infrastructure (direct leader, SWQoS TPU, relayer, RPC fallback), subject to network conditions.

Primary use cases

Integration testing: developers can verify that their transaction construction and tip attachment work correctly before moving to production.

Performance benchmarking: teams can compare Syncro Sender's landing rates against their existing infrastructure on real transactions.

Evaluation: prospective clients can test the service with actual transaction flow before requesting a dedicated endpoint.

Upgrading to a dedicated endpoint

Teams that are ready for production workloads can request a dedicated private endpoint through P2P.org's business development team. The dedicated endpoint provides higher throughput (up to 50 RPS), API key authentication, and the ability to use a single endpoint for both reads and writes.

This article is for informational purposes only and does not constitute a service agreement. Use of Syncro Sender is governed by the Terms of Service: https://www.p2p.org/syncro-terms