Crossbar API Endpoints

This page documents the HTTP and WebSocket endpoints exposed by Crossbar.

Base URL examples:

• Public: https://crossbar.switchboard.xyz

• Local: http://localhost:8080

For machine-readable schema and live testing:

• Swagger UI: GET /docs

• OpenAPI JSON: GET /api-docs/openapi.json

Core Endpoints

Method	Path	Purpose
GET	/health	Health check
GET	/version	Service version info
GET	/test	Basic test endpoint
GET	/protos/job_schemas.proto	Oracle job protobuf schema
POST	/store	Store v1 feed definition
GET	/fetch/{hash}	Fetch v1 feed definition
POST	/v2/store	Store v2 feed definition
GET	/v2/fetch/{feed_id}	Fetch v2 feed definition
GET	/v2/update/{feedHashes}	Build v2 multi-feed update payload
ANY	/rpc/{network}	RPC passthrough/proxy endpoint
GET	/debug/cid/{hash}	CID conversion/debug
GET	/debug/bnb	Binance debug endpoint

EVM Route Selection

Use different Crossbar routes depending on whether you are integrating a current Feed Builder/custom feed or an older aggregator-based EVM integration.

Use case	Use these routes	Identifier	Notes
Feed Builder/custom feed on EVM	/v2/fetch/{feed_id}, /v2/simulate/{feedHashes}, /v2/update/{feedHashes}	deterministic bytes32 feed ID / feed hash	Recommended flow for Monad and current custom-feed integrations. Use chain=evm, `network=mainnet
Legacy aggregator-based EVM integration	/simulate/evm/{network}/{aggregator_ids}, /updates/evm/{chainId}/{aggregatorIds}	legacy aggregator ID	Compatibility flow for older EVM integrations. Do not use this as the primary path for Feed Builder custom feeds.

Simulation Endpoints

Generic

Method	Path	Purpose
POST	/simulate	Simulate jobs from request body
POST	/simulate/jobs	Alias for /simulate
GET	/simulate/{feedHashes}	Simulate comma-separated feed hashes

Chain-specific

Method	Path	Purpose
POST	/simulate/solana	Simulate Solana feeds
GET	/simulate/solana/{network}/{feedpubkeys}	Simulate Solana feed pubkeys
POST	/simulate/eclipse	Simulate Eclipse feeds
GET	/simulate/eclipse/{network}/{feedpubkeys}	Simulate Eclipse feed pubkeys
POST	/simulate/evm	Simulate EVM aggregators
GET	/simulate/evm/{network}/{aggregator_ids}	Simulate EVM aggregator IDs
POST	/simulate/aptos	Simulate Aptos feeds
GET	/simulate/aptos/{network}/{feedhashes}	Simulate Aptos feed hashes
POST	/simulate/sui	Simulate Sui feeds
POST	/simulate/sui/feeds	Alias for Sui simulation
GET	/simulate/sui/{network}/{feedids}	Simulate Sui feed IDs
POST	/simulate/iota	Simulate Iota feeds
GET	/simulate/iota/{network}/{feedids}	Simulate Iota feed IDs

V2 simulation

Method	Path	Purpose
POST	/v2/simulate	Simulate v2 feed input payload
GET	/v2/simulate/{feedHashes}	Simulate v2 feed hashes
POST	/v2/simulate/proto	Simulate base64-encoded OracleFeed proto

Backward-compatible API prefix

Crossbar also exposes simulation routes under /api/simulate for compatibility. Example: POST /api/simulate, GET /api/simulate/{feedHashes}.

Update Endpoints

Method	Path	Purpose
GET	/updates/solana/{network}/{feedPubkeys}	Solana update instructions and oracle responses
GET	/updates/eclipse/{network}/{feedPubkeys}	Eclipse update instructions and oracle responses
GET	/updates/evm/{chainId}/{aggregatorIds}	EVM encoded updates
GET	/updates/evm/fetch_update_data/{chain_id}/{feed_ids}	EVM update-data variant
GET	/updates/aptos/{network}/{aggregatorAddresses}	Aptos aggregator updates
GET	/updates/sui/{network}/{aggregatorAddresses}	Sui aggregator updates
GET	/updates/iota/{network}/{aggregatorAddresses}	Iota aggregator updates

Gateway Endpoints

Method	Path	Purpose
GET	`/gateways?network=mainnet	devnet
POST	/gateways/fetch_signatures	Fetch signatures (single feed/job request)
POST	/gateways/fetch_signatures_consensus	Fetch consensus signatures

Oracle and Guardian Endpoints

Method	Path	Purpose
GET	/oracles	List Solana oracles
GET	/oracles/sui	List Sui oracles
GET	/oracles/aptos	List Aptos oracles
POST	/oracles/fetch_signatures	Fetch oracle signatures
GET	/guardians	List guardians

Randomness Endpoints

Method	Path	Purpose
POST	/randomness/evm	Fetch EVM randomness result payload

Stream (Surge) Endpoints

Method	Path	Purpose
GET	/stream/ws	WebSocket stream endpoint
GET	/stream/surge_feeds	List available Surge feeds
POST	/stream/request_session	Create Surge stream session token
GET	/stream/socket_metrics	Stream/socket metrics
GET	/stream/debug_binance	Binance stream debug info

Legacy Surge endpoints are also exposed when Surge is enabled:

Method	Path	Purpose
GET	/v1/surge/stream	Legacy Surge WebSocket endpoint
POST	/v1/surge/session	Legacy Surge session endpoint

Flamegraph Endpoints

Method	Path	Purpose
GET	/flamegraph	Flamegraph status/info
POST	/flamegraph/start	Start profiling
POST	/flamegraph/stop	Stop profiling
GET	/flamegraph/ui	Flamegraph UI

Detailed Request/Response Reference

Use this section for implementation-level request and response shapes. The tables above remain the quick index.

Simulation

POST /simulate/jobs

Purpose: simulate raw OracleJob[] directly (without fetching feed definitions from IPFS).

Request body:

{
  "jobs": [
    {
      "tasks": [
        { "valueTask": { "value": 42 } }
      ]
    }
  ],
  "includeReceipts": true,
  "variableOverrides": {
    "API_KEY": "..."
  },
  "network": "mainnet"
}

Response (200):

{
  "feedHash": "direct",
  "results": ["42"],
  "receipts": ["..."],
  "error": null
}

Notes:

• jobs also accepts base64-encoded protobuf entries.

• variableOverrides is optional.

• network defaults to mainnet when omitted.

POST /simulate/solana

Purpose: simulate one or more Solana feed pubkeys by loading on-chain feed state, resolving feed hash, loading jobs from IPFS, and running jobs.

Request body:

{
  "feeds": [
    "6dJY6fNn7q7eYxw8fPqfF7XULg1Wm3v3GJm6M6hQ8B9X"
  ],
  "network": "mainnet-beta",
  "includeReceipts": false
}

Response (200): array of per-feed simulation results.

[
  {
    "feed": "6dJY6fNn7q7eYxw8fPqfF7XULg1Wm3v3GJm6M6hQ8B9X",
    "feedHash": "617c43b30c588de5e620fa4c7b932e103301b9a160e2c24be69dbe0357e45797",
    "results": ["1.2345", "1.2351", "1.2339"],
    "receipts": null,
    "result": "1.2345",
    "stdev": "0.00049",
    "variance": "0.00024",
    "error": null
  }
]

Notes:

• network accepts values such as mainnet-beta, devnet, testnet.

• mainnet is normalized to mainnet-beta.

GET /simulate/{feedHashes}

Purpose: simulate one or more feed hashes directly from IPFS definitions.

Path:

• feedHashes: comma-separated feed hashes

Query:

• includeReceipts (bool, optional)

Response (200): array

[
  {
    "feedHash": "617c43b30c588de5e620fa4c7b932e103301b9a160e2c24be69dbe0357e45797",
    "results": ["1.2345", "1.2351"],
    "receipts": null,
    "error": null
  }
]

POST /v2/simulate

Purpose: simulate v2 feed hashes with optional network and variable overrides.

Request body:

{
  "feedHashes": [
    "617c43b30c588de5e620fa4c7b932e103301b9a160e2c24be69dbe0357e45797"
  ],
  "includeReceipts": false,
  "variableOverrides": {
    "API_KEY": "..."
  },
  "network": "mainnet"
}

Response (200):

{
  "feeds": [
    {
      "feedHash": "617c43b30c588de5e620fa4c7b932e103301b9a160e2c24be69dbe0357e45797",
      "feedName": "MINO/USD",
      "results": ["1.2345"],
      "receipts": null,
      "variableOverrides": {
        "API_KEY": "..."
      },
      "network": "mainnet"
    }
  ],
  "totalFeeds": 1,
  "successfulFeeds": 1,
  "failedFeeds": 0
}

Updates

GET /v2/update/{feedHashes}

Purpose: build a chain-specific consensus payload for one or more v2 feed hashes.

Path:

• feedHashes: comma-separated deterministic feed IDs / feed hashes

Query:

• chain (string, required for chain-specific payloads; use evm for EVM)

• network (string, optional; mainnet or testnet)

• use_timestamp (bool, optional)

• num_oracles (u32, optional)

• gateway (string, optional)

Response (200): object

{
  "medianResponses": [
    {
      "value": "123450000000000000000",
      "feedHash": "0xfd2b067707a96e5b67a7500e56706a39193f956a02e9c0a744bf212b19c7246c",
      "numOracles": 3
    }
  ],
  "oracleResponses": [],
  "timestamp": 1730000000,
  "slot": 0,
  "recentHash": "0xabc123...",
  "encoded": "0x8f6f2b7c..."
}

V2 update response schema:

• medianResponses: one consensus value per requested feed hash

• oracleResponses: per-oracle response detail

• timestamp: signed consensus timestamp

• slot: slot or sequence metadata from the gateway

• recentHash: recent hash used for the signed payload

• encoded: chain-specific encoded update payload

For EVM, wrap encoded into a one-element bytes[] when calling getFee or updateFeeds.

Monad example:

curl "http://localhost:8080/v2/update/0x4cd1cad962425681af07b9254b7d804de3ca3446fbfd1371bb258d2c75059812?chain=evm&network=testnet&use_timestamp=true"

GET /updates/solana/{network}/{feedPubkeys}

Purpose: generate Solana pull update instructions and oracle response metadata.

Path:

• network: mainnet, mainnet-beta, devnet, testnet

• feedPubkeys: comma-separated feed pubkeys

Query:

• numSignatures (u32, optional)

• payer (string, required)

Response (200): array of update objects

[
  {
    "success": true,
    "pullIxns": [
      "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"
    ],
    "responses": [
      {
        "oracle": "9pPCSotuPGUDgdYUtngMCemNi3KHdWFvwLhqx57KkbXb",
        "result": 1.1067679409326794,
        "errors": ""
      }
    ],
    "lookupTables": [
      "A43DyUGA7s8eXPxqEjJY6EBu1KKbNgfxF8h17VAHn13w"
    ]
  }
]

pullIxns wire format:

• Each array entry is a hex-encoded bincode serialization of solana_sdk::instruction::Instruction.

• Raw HTTP responses return these serialized strings directly.

• SDK helpers such as CrossbarClient.fetchSolanaUpdates may decode them into native instruction objects before returning to your application.

• lookupTables are still returned separately for address lookup table usage in versioned transactions.

Rust decode example:

use solana_sdk::instruction::Instruction;

fn decode_instruction(ix_hex: &str) -> anyhow::Result<Instruction> {
    let bytes = hex::decode(ix_hex)?;
    Ok(bincode::deserialize(&bytes)?)
}

GET /updates/eclipse/{network}/{feedPubkeys}

Response schema is the same as /updates/solana/{network}/{feedPubkeys}:

• success: bool

• pullIxns: array of hex-encoded serialized Instruction values

• responses: array of oracle responses

• lookupTables: array of address lookup table pubkeys (base58)

GET /updates/evm/{chainId}/{aggregatorIds}

Purpose: fetch EVM-compatible encoded updates and supporting oracle response data.

Path:

• chainId: EVM chain ID (example 1, 42161, 1116)

• aggregatorIds: comma-separated feed IDs

Query:

• numSignatures (u32, optional)

• gateway (string, optional)

Response (200): object

{
  "results": [
    {
      "result": "123450000000000000000"
    }
  ],
  "failures": [],
  "encoded": [
    "0x8f6f2b7c..."
  ]
}

EVM response schema:

• results: array of oracle response objects (includes normalized result and additional gateway-returned fields).

• failures: array of errors for feeds/oracles that failed during fetch/update building.

• encoded: array of 0x-prefixed ABI-encoded update payloads.

GET /updates/aptos/{network}/{aggregatorAddresses}

Response (200):

{
  "responses": [
    {
      "responses": [],
      "failures": [],
      "encoded": [
        "0x..."
      ]
    }
  ],
  "failures": [],
  "encoded": [
    "0x..."
  ]
}

Aptos response schema:

• responses: per-aggregator update objects returned by Aptos SDK.

• failures: top-level route errors.

• encoded: flattened list of encoded Aptos update payloads.

GET /updates/sui/{network}/{aggregatorAddresses}

Response (200):

{
  "responses": [
    {
      "results": [],
      "failures": []
    }
  ],
  "failures": []
}

Sui response schema:

• responses: per-aggregator update objects returned by Sui SDK (fetchUpdateInfo output).

• failures: top-level route errors.

GET /updates/iota/{network}/{aggregatorAddresses}

Response (200) matches the Sui endpoint shape:

{
  "responses": [
    {
      "results": [],
      "failures": []
    }
  ],
  "failures": []
}

Gateways

GET /gateways

Purpose: discover active gateway URLs from cached oracle state.

Query:

• network: mainnet (default), devnet, or testnet

Response (200):

[
  "https://gateway-1.example.com",
  "https://gateway-2.example.com"
]

POST /gateways/fetch_signatures

Purpose: fetch signatures for a single feed/jobs request. Supports both legacy and new request shapes.

Legacy body (feed-hash based):

{
  "feedHash": "617c43b30c588de5e620fa4c7b932e103301b9a160e2c24be69dbe0357e45797",
  "numSignatures": 3,
  "maxVariance": 50000000,
  "minResponses": 1,
  "useTimestamp": true
}

New body (jobs-based):

{
  "apiVersion": "1",
  "jobsB64Encoded": ["..."],
  "numOracles": 3,
  "maxVariance": 50000000,
  "minResponses": 1,
  "useTimestamp": true
}

Response (200): gateway signature response object (signatures + timestamp + variance).

POST /gateways/fetch_signatures_consensus

Purpose: fetch consensus signatures using feed request objects.

Request body:

{
  "apiVersion": "1",
  "feedRequests": [],
  "numOracles": 3,
  "useTimestamp": true
}

Response (200):

{
  "signatures": [],
  "timestamp": 1730000000,
  "variance": 0,
  "consensusReached": true
}

Stream (Surge)

GET /stream/surge_feeds

Purpose: list currently available Surge feed symbols.

Query:

• symbol (optional)

• exchange (optional)

Response (200): feed list object from Surge core. Response (503): no feeds available.

POST /stream/request_session

Purpose: validate API key and create session token + WebSocket URL.

Auth input:

• Header x-api-key: <key> preferred

• Also supports Authorization: Bearer <key>

• Also supports query param api_key=<key>

Request body:

{
  "client_ip": "203.0.113.10"
}

Response (200):

{
  "session_token": "...",
  "simulator_ws_url": "wss://.../v1/surge/stream"
}

Error responses:

• 400 missing API key

• 401 invalid API key

GET /stream/ws

Purpose: WebSocket stream endpoint for Surge updates. For full handshake, auth headers, subscribe payload, and ping/pong flow, see Surge Gateway Protocol.

Minimal curl examples

Simulate Solana feed:

curl -X POST http://localhost:8080/simulate/solana \
  -H "Content-Type: application/json" \
  -d '{
    "feeds": ["6dJY6fNn7q7eYxw8fPqfF7XULg1Wm3v3GJm6M6hQ8B9X"],
    "network": "mainnet-beta",
    "includeReceipts": false
  }'

Fetch EVM updates:

curl "http://localhost:8080/updates/evm/1116/0xfd2b067707a96e5b67a7500e56706a39193f956a02e9c0a744bf212b19c7246c"

Fetch a Monad custom-feed payload with the v2 route:

curl "http://localhost:8080/v2/update/0x4cd1cad962425681af07b9254b7d804de3ca3446fbfd1371bb258d2c75059812?chain=evm&network=testnet&use_timestamp=true"

Discover gateways:

curl "http://localhost:8080/gateways?network=mainnet"

Public Rate Limits

For https://crossbar.switchboard.xyz, rate limiting is layered and route-dependent:

Surface	Public limit behavior	Source
Network-level Switchboard oracle requests	Default 20 requests/second per user wallet; can be increased with stake	The Switchboard NCN
Crossbar public REST (/updates/*, gateway/signature routes)	Additional IP-based edge throttling; 429 Too Many Requests can appear under burst traffic	Public endpoint behavior, observed on March 3, 2026
Surge WebSocket access	Plan-based max connections (Plug: 1, Pro: 10, Enterprise: 15)	Surge pricing and limits

Operational guidance:

• Keep update polling conservative on public Crossbar and avoid burst fan-out.

• On 429, apply exponential backoff with jitter and retry.

• For steady high-throughput workloads, self-host Crossbar.

Notes

• Some stream and gateway flows require signature/auth headers. See Surge Gateway Protocol.

• Endpoint behavior can vary by network and environment configuration.

• Public Crossbar is rate limited by IP. Production systems should self-host.

• For complete machine schema and current field contracts, use GET /api-docs/openapi.json.