# Flashbots

**Canonical:** https://apis.io/providers/flashbots/  
**Website:** https://www.flashbots.net  
**APIs profiled:** 7

Flashbots is a research and development organization focused on mitigating the negative externalities of Maximal Extractable Value (MEV) on stateful blockchains, starting with Ethereum. Flashbots maintains and operates a set of public infrastructure: the Flashbots Auction JSON-RPC relay for bundle submission, Flashbots Protect RPC for private mempool transactions, the MEV-Share node and protocol for orderflow sharing, MEV-Boost middleware for validators, and SUAVE - an Ethereum-native, MEV-aware, privacy-first encrypted mempool.

## Kin Score — 38.9 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 38.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.8 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 35.7 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 35.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (7)

- **Flashbots Auction Relay (JSON-RPC)** — JSON-RPC endpoint for submitting bundles and private transactions to the Flashbots block builder. Supports eth_sendBundle, eth_callBundle, eth_cancelBundle, eth_sendPrivateTrans...
- **Flashbots Auction Relay (Sepolia Testnet)** — Sepolia testnet instance of the Flashbots Auction JSON-RPC relay for bundle submission and testing without mainnet ETH.
- **Flashbots Protect RPC** — Public-facing Ethereum JSON-RPC endpoint that routes transactions through Flashbots' private mempool to provide frontrunning protection, potential MEV and gas refunds via MEV-Sh...
- **MEV-Share Node API** — Public API for the MEV-Share node, an open-source protocol that lets users, wallets, and apps internalize MEV. Users send private transactions to the node, which selectively sha...
- **MEV-Boost Relay** — Public Flashbots-operated relay used by MEV-Boost middleware. Aggregates blocks from many builders and presents the most profitable one to the proposing validator. Used by valid...
- **SUAVE** — Single Unifying Auction for Value Expression - an Ethereum-native, MEV-aware, privacy-first encrypted mempool and decentralized block building network. Provides a testnet, SDKs,...
- **Flashbots Flashbots Auction & MEV Share Relay (JSON RPC) API** — The Flashbots Auction & MEV Share Relay (JSON RPC) API from Flashbots — 1 operation(s) for flashbots auction & mev share relay (json rpc).

## Agentic access (1)

- **Flashbots Agentic Access** — 1 operation · 1 acting

## Security (2)

- **Flashbots Authentication** — apiKey · 1 scheme
- **Flashbots Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Flashbots Plans Pricing**

## Tags

MEV, Ethereum, Blockchain, JSON-RPC, Relay, MEV-Boost, MEV-Share, Flashbots Protect, SUAVE, Block Builders, Validators

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/flashbots/). Scores are computed from the provider's own public artifacts under a published rubric.