# Harmonic

> Solana wins with performance and open, fair markets.

Harmonic lets Solana validators source blocks from multiple competing builders using configurable scheduling strategies to optimize revenue.

Harmonic provides Solana validators access to multiple competing block builders through an aggregation layer, addressing centralization in block construction. Validators configure their scheduling strategy for fee maximization, FIFO, SFDP-compliant, or custom, and receive full priority fee rewards with no intermediary deduction. It ships as a drop-in client for both Firedancer and Agave stacks with no vendor lock-in.

- Type: Company
- Sector: Infrastructure
- Status: Active
- Founded: 2025-11-05
- Profile: https://thegrid.id/profiles/harmonic

## Products

- [Harmonic](https://thegrid.id/profiles/harmonic): Harmonic is a block-building system for Solana validators that coordinates a market of competing block builders. Validators choose from configurable scheduling strategies: 50ms Frequent Batch Auctions with priority fee ordering, FIFO, Maximum Revenue Strategy, or a custom configuration and bind to a builder running that strategy. A Remote TPU distributes incoming transactions to all connected builders, which construct sequenced microbatches and stream them to validators through the Block Engine throughout each slot. The Block Engine verifies microbatches, manages builder bindings, and handles failover transparently during slot execution. Searchers submit bundles via a Jito-compatible gRPC interface; tips are processed as compute-unit priority fees with full distribution to validators and no protocol fee. (Shared Sequencer, Live, Main Product)

## Links

- [Main](https://harmonic.gg)
- [Documentation](https://docs.harmonic.gg)
- [Blog](https://harmonic.gg)
- [Terms of Service](https://harmonic.gg/terms-and-conditions)
- [Twitter / X](https://x.com/harmonic_gg)
- [Discord](https://discord.gg/gJMwY42ejS)
- [GitHub](https://github.com/harmonic)

## Legal

This data is provided under two licensing models.

Model 1 - open data. The open data core is licensed under the Open Database License (ODbL) — a copyleft/share-alike license allowing free use, modification, and sharing for any purpose. Attribution is required: include "Powered by The Grid" linking to https://thegrid.id wherever the data is used. Derivative databases must be shared under ODbL terms. Trademarks, logos, and brand names (marked "Special TPIP") are not covered by the ODbL. For ML/AI use: training datasets that substantially extract ODbL data are Derivative Databases and must be shared under ODbL if publicly used; models must be attributed in documentation.

Model 2 - commercial licenses. The Grid Data Service (TGDS) is also available as a commercial license. See [Web Services Terms](https://about.thegrid.id/legal/web-services-terms) for commercial use that is not covered by the open data service.

The following applies to both licensing models.
- All data is provided AS IS with no guarantees of accuracy.
- The Grid does not provide investment, legal, or tax advice, and
- a project's presence in The Grid's data does not imply endorsement.


- [Data Licensing & Disclaimers](https://about.thegrid.id/legal/data-licensing-and-disclaimers): Licensing models and disclaimers
- [Open Data (ODbL)](https://about.thegrid.id/legal/open-data): Open Database License terms and scope for The Grid's open data service.
- [Attribution Guidelines](https://about.thegrid.id/legal/open-data-attribution-guidelines): How to attribute The Grid's data when using the open data service.
- [Web Services Terms](https://about.thegrid.id/legal/web-services-terms): commercial Terms for using data services.
- [All Legal Documents](https://about.thegrid.id/legal): Full index of terms, policies, and disclosures

## Optional

- [TGS Field Descriptions](https://github.com/The-Grid-Data/workspace-public/blob/main/references/tgs-field-descriptions.md): Schema field definitions for The Grid's data model
- [TGS JSON Structure](https://github.com/The-Grid-Data/workspace-public/blob/main/references/tgs-json-structure.md): Data model structure and relationships
- [Product Type Definitions](https://github.com/The-Grid-Data/workspace-public/blob/main/references/product-type-definitions.md): Definitions for each product type
- [Product Type Classification](https://github.com/The-Grid-Data/workspace-public/blob/main/references/product-type-classification.md): Guide for classifying products into types
- [Grid MCP Guide](https://github.com/The-Grid-Data/workspace-public/blob/main/grid-search/skills/grid-query/references/grid-mcp-guide.md): How to query The Grid programmatically via MCP