Polkadot
Polkadot is a multi-chain blockchain network that enables interoperability between specialized blockchains called parachains. Developer APIs are provided through Subscan (a multi-chain block explorer with a hosted HTTP API) and the Substrate API Sidecar (a REST interface for Polkadot SDK-based chains), enabling queries against extrinsics, events, accounts, blocks, staking data, and parachain state on Polkadot, Kusama, and related networks.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Polkadot the way a machine reads it — 121 machine-readable artifacts across 3 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Polkadot scores 36.9/100 (thin), with a separate agent-readiness read of 26/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Polkadot
Each block below is one kind of artifact we hold for Polkadot. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 57
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Polkadot Account API
The Account API from Polkadot — 12 operation(s) for account.
Polkadot accounts API
Account balance, staking, and proxy information
Polkadot ahm API
Asset Hub Migration information
Polkadot Assets API
The Assets API from Polkadot — 5 operation(s) for assets.
Polkadot Avail API
The Avail API from Polkadot — 5 operation(s) for avail.
Polkadot Bifrost API
The Bifrost API from Polkadot — 2 operation(s) for bifrost.
Polkadot Block API
The Block API from Polkadot — 3 operation(s) for block.
Polkadot blocks API
Block queries and extrinsic data
Polkadot capabilities API
API capabilities and chain pallets
Polkadot Collator API
The Collator API from Polkadot — 4 operation(s) for collator.
Polkadot Common API
The Common API from Polkadot — 1 operation(s) for common.
Polkadot Contracts API
The Contracts API from Polkadot — 9 operation(s) for contracts.
Polkadot coretime API
Coretime system information
Polkadot CrustStorage API
The CrustStorage API from Polkadot — 8 operation(s) for cruststorage.
Polkadot Currency API
The Currency API from Polkadot — 3 operation(s) for currency.
Polkadot Enjin API
The Enjin API from Polkadot — 7 operation(s) for enjin.
Polkadot Event API
The Event API from Polkadot — 3 operation(s) for event.
Polkadot EVM API
The EVM API from Polkadot — 22 operation(s) for evm.
Polkadot Extrinsic API
The Extrinsic API from Polkadot — 6 operation(s) for extrinsic.
Polkadot ForeignAssets API
The ForeignAssets API from Polkadot — 6 operation(s) for foreignassets.
Polkadot Governance API
The Governance API from Polkadot — 40 operation(s) for governance.
Polkadot health API
Health check
Polkadot Log API
The Log API from Polkadot — 2 operation(s) for log.
Polkadot Metadata API
The Metadata API from Polkadot — 1 operation(s) for metadata.
Polkadot Midnight API
The Midnight API from Polkadot — 11 operation(s) for midnight.
Polkadot Moonbeam API
The Moonbeam API from Polkadot — 1 operation(s) for moonbeam.
Polkadot MultiChain API
The MultiChain API from Polkadot — 5 operation(s) for multichain.
Polkadot Multisig API
The Multisig API from Polkadot — 3 operation(s) for multisig.
Polkadot NFTs API
The NFTs API from Polkadot — 7 operation(s) for nfts.
Polkadot node API
Connected node information
Polkadot NominationPools API
The NominationPools API from Polkadot — 6 operation(s) for nominationpools.
Polkadot pallets API
Runtime pallet metadata, storage, constants, events, errors
Polkadot Parachain API
The Parachain API from Polkadot — 7 operation(s) for parachain.
Polkadot paras API
Parachain inclusion data
Polkadot PRO API
Pro-only endpoints require a Subscan Pro plan.
Polkadot Proxy API
The Proxy API from Polkadot — 1 operation(s) for proxy.
Polkadot rc accounts API
The rc accounts API from Polkadot — 5 operation(s) for rc accounts.
Polkadot rc API
Relay chain endpoints (available on parachains only)
Polkadot rc blocks API
The rc blocks API from Polkadot — 8 operation(s) for rc blocks.
Polkadot rc node API
The rc node API from Polkadot — 3 operation(s) for rc node.
Polkadot rc pallets API
The rc pallets API from Polkadot — 13 operation(s) for rc pallets.
Polkadot rc runtime API
The rc runtime API from Polkadot — 5 operation(s) for rc runtime.
Polkadot rc staking API
The rc staking API from Polkadot — 4 operation(s) for rc staking.
Polkadot rc transaction API
The rc transaction API from Polkadot — 5 operation(s) for rc transaction.
Polkadot runtime API
Runtime specification, metadata, and code
Polkadot Scheduler API
The Scheduler API from Polkadot — 3 operation(s) for scheduler.
Polkadot Search API
The Search API from Polkadot — 1 operation(s) for search.
Polkadot Staking API
The Staking API from Polkadot — 19 operation(s) for staking.
Polkadot Stat API
The Stat API from Polkadot — 4 operation(s) for stat.
Polkadot Sxt API
The Sxt API from Polkadot — 2 operation(s) for sxt.
Polkadot Tokens API
The Tokens API from Polkadot — 8 operation(s) for tokens.
Polkadot trace API
The trace API from Polkadot — 4 operation(s) for trace.
Polkadot transaction API
Transaction submission, fee estimation, and construction material
Polkadot Uniques API
The Uniques API from Polkadot — 8 operation(s) for uniques.
Polkadot version API
API version
Polkadot Vesting API
The Vesting API from Polkadot — 1 operation(s) for vesting.
Polkadot Xcm API
The Xcm API from Polkadot — 10 operation(s) for xcm.
Scroll within the panel for all 57 ·
Open Collections 58
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONPolkadot REST Account API
OPEN COLLECTIONPolkadot REST Account accounts API
OPEN COLLECTIONPolkadot REST Account ahm API
OPEN COLLECTIONPolkadot REST Account Assets API
OPEN COLLECTIONPolkadot REST Account Avail API
OPEN COLLECTIONPolkadot REST Account Bifrost API
OPEN COLLECTIONPolkadot REST Account Block API
OPEN COLLECTIONPolkadot REST Account blocks API
OPEN COLLECTIONPolkadot REST Account capabilities API
OPEN COLLECTIONPolkadot REST Account Collator API
OPEN COLLECTIONPolkadot REST Account Common API
OPEN COLLECTIONPolkadot REST Account Contracts API
OPEN COLLECTIONPolkadot REST Account coretime API
OPEN COLLECTIONPolkadot REST Account CrustStorage API
OPEN COLLECTIONPolkadot REST Account Currency API
OPEN COLLECTIONPolkadot REST Account Enjin API
OPEN COLLECTIONPolkadot REST Account Event API
OPEN COLLECTIONPolkadot REST Account EVM API
OPEN COLLECTIONPolkadot REST Account Extrinsic API
OPEN COLLECTIONPolkadot REST Account ForeignAssets API
OPEN COLLECTIONPolkadot REST Account Governance API
OPEN COLLECTIONPolkadot REST Account health API
OPEN COLLECTIONPolkadot REST Account Log API
OPEN COLLECTIONPolkadot REST Account Metadata API
OPEN COLLECTIONPolkadot REST Account Midnight API
OPEN COLLECTIONPolkadot REST Account Moonbeam API
OPEN COLLECTIONPolkadot REST Account MultiChain API
OPEN COLLECTIONPolkadot REST Account Multisig API
OPEN COLLECTIONPolkadot REST Account NFTs API
OPEN COLLECTIONPolkadot REST Account node API
OPEN COLLECTIONPolkadot REST Account NominationPools API
OPEN COLLECTIONPolkadot REST Account pallets API
OPEN COLLECTIONPolkadot REST Account Parachain API
OPEN COLLECTIONPolkadot REST Account paras API
OPEN COLLECTIONPolkadot REST Account PRO API
OPEN COLLECTIONPolkadot REST Account Proxy API
OPEN COLLECTIONPolkadot REST Account rc accounts API
OPEN COLLECTIONPolkadot REST Account rc API
OPEN COLLECTIONPolkadot REST Account rc blocks API
OPEN COLLECTIONPolkadot REST Account rc node API
OPEN COLLECTIONPolkadot REST Account rc pallets API
OPEN COLLECTIONPolkadot REST Account rc runtime API
OPEN COLLECTIONPolkadot REST Account rc staking API
OPEN COLLECTIONPolkadot REST Account rc transaction API
OPEN COLLECTIONPolkadot REST Account runtime API
OPEN COLLECTIONPolkadot REST Account Scheduler API
OPEN COLLECTIONPolkadot REST Account Search API
OPEN COLLECTIONPolkadot REST Account Staking API
OPEN COLLECTIONPolkadot REST Account Stat API
OPEN COLLECTIONPolkadot REST Account Sxt API
OPEN COLLECTIONPolkadot REST Account Tokens API
OPEN COLLECTIONPolkadot REST Account trace API
OPEN COLLECTIONPolkadot REST Account transaction API
OPEN COLLECTIONPolkadot REST Account Uniques API
OPEN COLLECTIONPolkadot REST Account version API
OPEN COLLECTIONPolkadot REST Account Vesting API
OPEN COLLECTIONPolkadot REST Account Xcm API
OPEN COLLECTIONScroll within the panel for all 58 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Subscan
PLANSRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Subscan
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Subscan
FINOPSSemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Apis Context
JSON-LDSecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Polkadot — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/polkadot · machine-readable index on apis.io
This is an independent, third-party profile of Polkadot, 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.
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