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
Kadena

Kadena payload API

Raw literal Block Payloads in the form in which they are stored on the chain.By default only the payload data is returned which is sufficient for validatingthe blockchain Merkle Tree. It is also sufficient as input to Pact forexecuting the Pact transactions of the block and recomputing the outputs.It is also possible to query the transaction outputs along with the payload data.

Documentation Provider Profile APIs.io OpenAPI GitHub

Kadena payload API is one of 16 APIs that Kadena publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

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

This API exposes 4 operations across 4 paths, and defines 8 schemas. It is described by OpenAPI 3.2.0, at version 0.0.

Requests are made against 5 base URLs: https://api.chainweb.com/chainweb/{apiVersion}/mainnet01, https://api.testnet.chainweb.com/chainweb/{apiVersion}/testnet04, {schema}://{domain}:{port}/chainweb/{apiVersion}/{chainwebVersion}, https://{location}.chainweb.com/chainweb/{apiVersion}/mainnet01, https://{location}.testnet.chainweb.com/chainweb/{apiVersion}/testnet04.

4 operations 4 paths 8 schemas 2 GET2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
0.0
Base URL
https://api.chainweb.com/chainweb/0.0/mainnet01
Resource Areas
1

Paths & Operations 4

Across 4 paths, the API surfaces 4 operations — 2 GET, 2 POST. Each is listed below with its method, path, parameters, and response codes.

payload 4

Raw literal Block Payloads in the form in which they are stored on the chain. By default only the payload data is returned which is sufficient for validating the blockchain Merkle…

GET
/chain/{chain}/payload/{payloadHash}
Get Block Payload
3 params → 200404
POST
/chain/{chain}/payload/batch
Get Batch of Block Payload
1 param body → 200
GET
/chain/{chain}/payload/{payloadHash}/outputs
Get Block Payload With Outputs
3 params → 200404
POST
/chain/{chain}/payload/outputs/batch
Get Batch of Block Payload With Outputs
1 param body → 200

Schemas 8

The contract defines 8 schemas that model the data the API accepts and returns. The most detailed are payloadWithOutputs (6 properties), payload (5 properties), payloadBatchBody (2 properties). Each schema is shown below with its type and property counts.

sha256Hash
string
Base64Url (without padding) encoded SHA256 hash
payloadWithOutputs
object
Payload with outputs of a Block including the Merkle roots for transactions and transaction outputs
6 properties 6 required
hostAddress
string
Host address containing IPv4 and port
posixTimestamp
integer
Seconds since POSIX epoch
payload
object
Payload of a Block including the Merkle roots for transactions and transaction outputs.
5 properties 5 required
payloadHashArray
array
payloadHash
Base64Url (without padding) encoded block payload hash
payloadBatchBody
object
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

kadena-payload-api-openapi.yml Raw ↑

Other APIs Kadena publishes across the network.

Kadena block API
AE Profile APIs.io
Kadena blockhash API
AE Profile APIs.io
Kadena config API
AE Profile APIs.io
Kadena cut API
AE Profile APIs.io
Kadena endpoint-listen API
AE Profile APIs.io
Kadena endpoint-local API
AE Profile APIs.io
Kadena endpoint-poll API
AE Profile APIs.io
Kadena endpoint-private API
AE Profile APIs.io
Kadena endpoint-send API
AE Profile APIs.io
Kadena endpoint-spv API
AE Profile APIs.io
Kadena header API
AE Profile APIs.io
Kadena mempool API
AE Profile APIs.io
#Payload
← Back to K APIs
API Details
ID
kadena:kadena-payload-api
Base URL
https://api.chainweb.com/chainweb/0.0/mainnet01
Docs
https://docs.kadena.io/api/chainweb-api
Provider
Kadena
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=kadena-payload-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/kadena-payload-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 Kadena payload 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.