How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Need help?

Contact us
Flashbots

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).

Documentation Provider Profile APIs.io OpenAPI GitHub

Flashbots Flashbots Auction & MEV Share Relay (JSON RPC) API is one of 7 APIs that Flashbots publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

The published artifact set on APIs.io includes an OpenAPI specification.

This API exposes 1 operation across 1 path, and defines 17 schemas. It is described by OpenAPI 3.1.0, at version 1.0.

Requests are made against 2 base URLs: https://relay.flashbots.net, https://relay-sepolia.flashbots.net.

1 operations 1 paths 17 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
1.0
Base URL
https://relay.flashbots.net
Authentication
API Key
Contact
Flashbots
Resource Areas
1

Authentication & Security 1

Flashbots Flashbots Auction & MEV Share Relay (JSON RPC) API declares 1 security scheme for authenticating requests. An API key is passed in the header as X-Flashbots-Signature (flashbotsSignature). By default, every request must be authenticated.

  • flashbotsSignature — Format: :

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

Flashbots Auction & MEV Share Relay (JSON RPC) 1
POST
/
JSON-RPC 2.0 endpoint
jsonRpc body → 200

Schemas 17

The contract defines 17 schemas that model the data the API accepts and returns. The most detailed are JsonRpcResponse (4 properties), JsonRpcBase (4 properties). Each schema is shown below with its type and property counts.

JsonRpcResponse
object
4 properties 2 required
FlashbotsGetFeeRefundsByRecipient
EthCancelPrivateTransaction
EthSendPrivateTransaction
JsonRpcBase
object
4 properties 3 required
EthCallBundle
EthSendBundle
FlashbotsGetFeeRefundTotalsByRecipient
FlashbotsGetFeeRefundsByBlock
FlashbotsGetFeeRefundsByBundle
BuilderNetGetDelayedRefunds
EthSendPrivateRawTransaction
FlashbotsSetFeeRefundRecipient
MevSendBundle
EthCancelBundle
BuilderNetGetDelayedRefundTotalsByRecipient
MevSimBundle

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

flashbots-flashbots-auction-mev-share-relay-json-rpc-api-openapi.yml Raw ↑

Other APIs Flashbots publishes across the network.

Flashbots Auction Relay (JSON-RPC)
AE Profile APIs.io
Flashbots Auction Relay (Sepolia Testnet)
AE Profile APIs.io
Flashbots Protect RPC
AE Profile APIs.io
MEV-Share Node API
AE Profile APIs.io
MEV-Boost Relay
AE Profile APIs.io
SUAVE
AE Profile APIs.io
← Back to F APIs
API Details
ID
flashbots:flashbots-flashbots-auction-mev-share-relay-json-rpc-api
Base URL
https://relay.flashbots.net
Docs
https://docs.flashbots.net/flashbots-auction/advanced/rpc-endpoint
Provider
Flashbots
APIs.io →  GitHub →
Explore more
All APIs Providers APIs.io Network
Work with this as data

Every API here is available over the API and to AI agents over MCP. APIs is not yet its own endpoint on the v1 API. Reach this content through network search and the tag graph, or the MCP server below.

Installs https://mcp.apievangelist.com/mcp in Claude, Cursor, VS Code and the rest — one button, every client.

MCP tools for apis
4 tools reach this content
  • search_api_evangelistSearch every content type across the network at once.
  • find_relatedThe shared-tag relevance graph — what else covers this.
  • get_tagEverything one tag labels, across all content types.
  • guide_topicPRO — a curated bundle for a topic: area, guidance, rules, papers, stories, services.
All tools & prompts
Call it yourself
curl for this page
Search the network for this 
curl "https://api.apievangelist.com/v1/search?q=flashbots-flashbots-auction-mev-share-relay-json-rpc-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/flashbots-flashbots-auction-mev-share-relay-json-rpc-api"

Discovery needs no key. Full bodies and the synthesis endpoints are Pro.

Get an API key

Free tier, no email required. Sign in with whichever identity you already have.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have. Your account

Where this information came from

This is an independent, third-party profile of Flashbots Flashbots Auction & MEV Share Relay (JSON RPC) API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.