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© 2026 MadeOnSol

MadeOnSol — eenmanszaak, Hulshout, Belgium · KBO/BTW BE 1039.535.538 (art. 56bis, no VAT charged)

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ToolsDeveloper ToolsHarmonic

Developer Tools · Solana

Harmonic logo — Solana Developer Tools tool

Harmonic

Open block building system for Solana validators with exchange-grade performance

Developer Tools
Healthy

Rating

5.0★

1 review

Health

97/100

Checked 12d ago

Pricing

Free

See pricing section

Updated

Oct 2026

Developer Tools

Froglabs Bundler — Trade. Launch. Snipe. 7 days free with code MADEONSOLSponsored

Overview

What Harmonic actually does.

Harmonic is a Paradigm-backed open block building system designed to optimize Solana validator revenue and throughput. It applies HFT-style block construction techniques — the kind used in high-frequency trading and exchange engines — to the problem of ordering and packing transactions into Solana blocks, helping validators capture more value while improving overall network performance. The system ships with Dissonance, a block explorer that surfaces insights most generic explorers don't expose. Dissonance breaks down fee distributions by block order position, categorizes transactions by the program that produced them, and provides detailed block production analytics. This gives a granular view into how value flows through each block and where fees concentrate. Harmonic is aimed squarely at Solana validators and infrastructure-level developers who care about block-building efficiency and MEV-adjacent revenue. Operators looking to squeeze more performance and yield out of their nodes, and researchers studying transaction ordering, are the natural audience rather than everyday traders or end users. As deep validator infrastructure, Harmonic is not a consumer-facing product, and getting value from it requires running or operating Solana validator tooling. The analytics in Dissonance are powerful but assume familiarity with block production internals, so the learning curve is steep for anyone outside the validator and infra community.

Live health

Uptime, SSL, response time.

Health & Activity

Uptime 30d

100.0%

Website
Online
SSL
Valid
Social Activity
Active(8d ago)
Last checked: 12d ago

Latest from @harmonic_gg

8d ago

harmonic bundles: now available to all https://t.co/ZszcbCJfiM

View on X

Key features

What's in the box.

  • HFT-style block construction to optimize validator revenue and throughput
  • Dissonance block explorer with fee distribution by block order
  • Transaction breakdowns categorized by program
  • Detailed block production analytics for validators and developers
  • Open block building system backed by Paradigm

Verdict

The honest tradeoffs.

Pros

  • Brings exchange-grade, HFT-style techniques to Solana block building
  • Dissonance exposes block-level insights most explorers omit
  • Backed by Paradigm, a notable infrastructure investor
  • Open system rather than a closed proprietary stack

Cons

  • Built for validators and infra developers, not everyday users
  • Requires technical setup and validator operation to benefit
  • Block-building analytics assume deep Solana internals knowledge

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Reviews

What users say about Harmonic.

Reviews (1)

Harmonic made building with on-chain data way faster, with clean APIs and docs that got my app from zero to live in a weekend.

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From the blog

Articles mentioning Harmonic.

Robinhood Chain Wallet Analytics with Chainstack and MadeOnSol

Robinhood Chain Wallet Analytics with Chainstack and MadeOnSol

A read-only design for a Robinhood Chain wallet dashboard: MadeOnSol's indexed wallet swaps feed the activity view, Chainstack RPC receipts attach transaction evidence, and each field keeps track of where it came from.

7 min read

Is Your API Agent-Ready? A Checklist (2026)

Is Your API Agent-Ready? A Checklist (2026)

The most common reason AI agents fail against an API isn't missing data — it's undocumented rate limits and no machine-readable discovery. A concrete, dated checklist for what agent-ready actually means in 2026, using MadeOnSol's own build as the worked example.

7 min read

White-Label Solana Data: What Redistribution Rights Actually Mean for Your Product (2026)

White-Label Solana Data: What Redistribution Rights Actually Mean for Your Product (2026)

You can often embed a Solana data API in your app on a self-serve plan, but the moment you resell the data, expose it as your own feed, or strip the branding, you're in licensing territory most builders discover too late. This guide maps the three usage zones (internal use, user-facing display, redistribution), the questions to ask any data vendor before you build, and what an Enterprise data license actually covers: white-label, bulk export, extended caching, SLA, and dedicated limits.

5 min read

Compare Harmonic

Compare

Compare Harmonic head-to-head.

Side-by-side with the most popular Developer Tools tools — features, fees, ratings, uptime & safety.

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Link verified working · Oct 3, 2026

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Track KOL trades & rug-check any token by API

The data behind MadeOnSol — 2,000+ KOL wallets, deployer reputation, token risk scores — over REST and WebSocket. Free key, 200 calls/day, no payment to start.

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