Harmonic GG

Harmonic Searcher API (gRPC)

gRPC bundle-submission interface for searchers. Authenticate with a Solana keypair (challenge-response to Bearer tokens), then submit atomic transaction bundles with revert protection. Backwards-compatible with Jito's searcher protos; tips are priority fees with no protocol cut. Requires a whitelisted searcher pubkey.

GitHub

Documentation

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Authentication
https://raw.githubusercontent.com/api-evangelist/harmonic-gg/refs/heads/main/authentication/harmonic-gg-authentication.yml

Other Resources

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Protobuf
https://raw.githubusercontent.com/api-evangelist/harmonic-gg/refs/heads/main/grpc/harmonic-gg-searcher-searcher.proto
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Protobuf
https://raw.githubusercontent.com/api-evangelist/harmonic-gg/refs/heads/main/grpc/harmonic-gg-searcher-auth.proto
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Protobuf
https://raw.githubusercontent.com/api-evangelist/harmonic-gg/refs/heads/main/grpc/harmonic-gg-searcher-bundle.proto
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ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/harmonic-gg/refs/heads/main/errors/harmonic-gg-error-codes.yml
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APIsJSON
https://raw.githubusercontent.com/api-evangelist/harmonic-gg/refs/heads/main/apis.yml

API entry from apis.yml

apis.yml Raw ↑ 
name: Harmonic Searcher API (gRPC)
description: gRPC bundle-submission interface for searchers. Authenticate with a Solana keypair (challenge-response
  to Bearer tokens), then submit atomic transaction bundles with revert protection. Backwards-compatible
  with Jito's searcher protos; tips are priority fees with no protocol cut. Requires a whitelisted searcher
  pubkey.
humanURL: https://docs.harmonic.gg/searchers/harmonic-bundles
baseURL: https://fra.be.harmonic.gg
tags:
- Solana
- MEV
- Bundles
- gRPC
properties:
- type: Protobuf
  url: grpc/harmonic-gg-searcher-searcher.proto
- type: Protobuf
  url: grpc/harmonic-gg-searcher-auth.proto
- type: Protobuf
  url: grpc/harmonic-gg-searcher-bundle.proto
- type: Authentication
  url: authentication/harmonic-gg-authentication.yml
- type: ErrorCatalog
  url: errors/harmonic-gg-error-codes.yml