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Airstack SubmitMessage API

The SubmitMessage API from Airstack — 1 operation(s) for submitmessage.

Airstack SubmitMessage API is one of 14 APIs that Airstack publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include SubmitMessage. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 1 operation across 1 path, and defines 34 schemas. It is described by OpenAPI 3.2.0, at version 1.0.

Requests are made against a single base URL, https://hubs.airstack.xyz.

1 operations 1 paths 34 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0
Base URL
https://api.airstack.xyz/graphql
Authentication
API Key
Resource Areas
1

Authentication & Security 1

Airstack SubmitMessage API declares 1 security scheme for authenticating requests. An API key is passed in the header as x-airstack-hubs (ApiKeyAuth). By default, every request must be authenticated.

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.

SubmitMessage 1
POST
/v1/submitMessage
Submit a signed protobuf-serialized message to the Hub
SubmitMessage body → 200default

Schemas 34

The contract defines 34 schemas that model the data the API accepts and returns. The most detailed are CastAddBody (7 properties), UserNameProof (6 properties), ErrorResponse (6 properties), MessageCommon (5 properties). Each schema is shown below with its type and property counts.

ErrorResponse
object
6 properties 6 required
CastRemoveBody
object
Removes an existing Cast
1 property 1 required
MessageDataUserDataAdd
CastId
object
Identifier used to look up a Cast
2 properties 2 required
MessageDataCommon
object
3 properties 3 required
UserNameType
string
ReactionType
string
Type of Reaction. - REACTIONTYPELIKE: Like the target cast - REACTIONTYPERECAST: Share target cast to the user's audience
UserNameProof
object
6 properties 6 required
LinkType
string
Type of Link. - follow: Follow another user
MessageDataUsernameProof
MessageDataVerificationRemove
UserDataBody
object
Adds metadata about a user
2 properties 2 required
Embed
UserDataType
string
Type of UserData. - USERDATATYPEPFP: Profile Picture for the user - USERDATATYPEDISPLAY: Display Name for the user - USERDATATYPEBIO: Bio for the user - USERDA…
MessageDataReaction
HashScheme
string
Type of hashing scheme used to produce a digest of MessageData. - HASHSCHEMEBLAKE3: Default scheme for hashing MessageData
MessageCommon
object
5 properties 5 required
LinkBody
object
Adds or removes a Link
3 properties 2 required
CastAddBody
object
Adds a new Cast
7 properties 5 required
Message
A Message is a delta operation on the Farcaster network. The message protobuf is an envelope that wraps a MessageData object and contains a hash and signature…
MessageDataLink
MessageDataCastRemove
CastHash
string
FarcasterNetwork
string
Farcaster network the message is intended for. - FARCASTERNETWORKMAINNET: Public primary network - FARCASTERNETWORKTESTNET: Public test network - FARCASTERNETW…
VerificationRemoveBody
object
Removes a Verification of any type
1 property 1 required
MessageDataFrameAction
FrameActionBody
object
A Farcaster Frame action
3 properties 3 required
VerificationAddEthAddressBody
object
Adds a Verification of ownership of an Ethereum Address
3 properties 3 required
SignatureScheme
string
Type of signature scheme used to sign the Message hash - SIGNATURESCHEMEED25519: Ed25519 signature (default) - SIGNATURESCHEMEEIP712: ECDSA signature using EIP…
MessageDataCastAdd
MessageDataVerificationAdd
UrlEmbed
object
1 property 1 required
ReactionBody
object
Adds or removes a Reaction from a Cast
3 properties 1 required
CastEmbed
object
1 property 1 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

airstack-submitmessage-api-openapi.yml Raw ↑

Other APIs Airstack publishes across the network.

Airstack GraphQL API
Airstack Casts API
Airstack FIDs API
Airstack HubEvents API
Airstack Links API
Airstack OnChainEvents API
Airstack Reactions API
Airstack Storage API
Airstack UserData API
Airstack Usernames API
Airstack ValidateMessage API
Airstack Verifications API
Where this information came from

This is an independent, third-party profile of Airstack SubmitMessage 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.

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