PubFiDISCOVERY
Get an API key

Category hub

Blockchain RPC APIs

A blockchain RPC API gives applications and agents access to node-backed reads and writes, but the practical buyer question is usually about managed infrastructure quality, archive support, chain coverage, authentication, and rate-limit behavior. This Discovery page owns the blockchain RPC API wedge without claiming that every listed provider is already routed through PubFi

Claim-safe statuses distinguish Provider Profiles, evaluation-only pages, requested integrations, and available gateway/tooling surfaces without exposing paid procurement, approval, or provider-fetching flows

At a glance

Category summary

Primary public prompt
blockchain RPC API
Definition
Blockchain RPC API, node, archive, and infrastructure providers for application reads.
Sources
23
Capabilities
23
Chain hubs
5
Use-case groups
33
Last verified
PubFi status
Discovery comparison and request-routing surface; individual source pages carry claim-safe integration status.

Official-source citations

OnFinality Primary coverage
Managed RPC, archive node, and infrastructure services for Polkadot and other blockchain networks Source
OnFinality Fixture coverage
RPC infrastructure and on-chain state coverage for the Polkadot fixture target Source
Alchemy Primary coverage
RPC endpoints and blockchain infrastructure for Ethereum, Solana, and other networks Source
Alchemy Discovery category
RPC infrastructure Source
Infura Primary coverage
Ethereum and multichain API infrastructure for RPC access, IPFS, and developer network services Source
Infura Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
QuickNode Primary coverage
RPC endpoint and blockchain infrastructure services across Ethereum, Solana, and other networks Source
QuickNode Fixture coverage
RPC infrastructure coverage for Ethereum and Solana fixture targets Source
Ankr Primary coverage
RPC and blockchain infrastructure network for multichain endpoint access Source
Ankr Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
Chainstack Primary coverage
Managed blockchain nodes, RPC endpoints, and infrastructure tools for Web3 applications Source
Chainstack Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
Blockdaemon Primary coverage
Institutional blockchain node infrastructure, staking, wallet, and API services Source
Blockdaemon Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
GetBlock Primary coverage
Shared and dedicated blockchain node API access across major networks Source
GetBlock Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
NOWNodes Primary coverage
Explorer and node API access across many crypto networks Source
NOWNodes Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
Pokt Network Primary coverage
Decentralized RPC infrastructure that routes application requests across independent node operators Source
Pokt Network Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
Blast API Primary coverage
RPC endpoints, archive access, and Web3 infrastructure services Source
Blast API Fixture coverage
RPC infrastructure coverage for the Ethereum fixture target Source
MetaMask API Public docs evidence
MetaMask has public API or documentation evidence available from public sources. Source
MetaMask API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Ethereum API Public docs evidence
Ethereum has public API or documentation evidence available from public sources. Source
Ethereum API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Chainupcloud API Public docs evidence
Chainupcloud has public API or documentation evidence available from public sources. Source
Chainupcloud API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Google API Public docs evidence
Google has public API or documentation evidence available from public sources. Source
Google API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Postman API Public docs evidence
Postman has public API or documentation evidence available from public sources. Source
Postman API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
AWS API Public docs evidence
AWS has public API or documentation evidence available from public sources. Source
AWS API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Pinata API Public docs evidence
Pinata has public API or documentation evidence available from public sources. Source
Pinata API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
thirdweb API Public docs evidence
thirdweb has public API or documentation evidence available from public sources. Source
thirdweb API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
BNB Chain API Public docs evidence
BNB Chain has public API or documentation evidence available from public sources. Source
BNB Chain API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Cosmos Network API Public docs evidence
Cosmos Network has public API or documentation evidence available from public sources. Source
Cosmos Network API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
ZKsync API Public docs evidence
ZKsync has public API or documentation evidence available from public sources. Source
ZKsync API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.
Syndica API Public docs evidence
Syndica has public API or documentation evidence available from public sources. Source
Syndica API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.

Editorial overview

RPC infrastructure is not interchangeable with indexed on-chain-state APIs. OnFinality is the Polkadot-first starting point in the current launch wedge because its fixture includes managed RPC, archive node, and infrastructure services for Polkadot. Ethereum-oriented providers such as Alchemy, Infura, QuickNode, Ankr, and Chainstack broaden the comparison set, but this page should not imply that every provider has the same chain depth, plan model, or PubFi integration status.

Start here recommendations

OnFinality

Why start here
Start here for Polkadot RPC and archive infrastructure evaluation because the seed fixture maps it directly to Polkadot RPC infrastructure coverage.
Best for
Polkadot managed RPC

QuickNode

Why start here
Use as a broad managed-RPC comparison point when the shortlist needs established multichain infrastructure options.
Best for
Broad managed RPC comparison

Alchemy

Why start here
Use as a familiar Ethereum RPC benchmark when comparing developer tooling, docs, and production expectations.
Best for
Ethereum-oriented benchmark

Decision criteria and landscape gaps

Evaluation criteria

  • Confirm whether the workload needs standard RPC, archive access, enhanced APIs, or indexed product endpoints.
  • Compare free and paid rate-limit models only when the official pricing or docs expose enough detail to support the claim.
  • Check status-page availability and incident history separately from general provider reputation.
  • Treat PubFi routing as source-specific; request routing for providers that are useful but not currently marked gateway-available.

Provider landscape gaps

  • RPC providers often advertise broad network coverage before a buyer can see archive depth, method availability, or throughput by plan.
  • Rate-limit units vary across providers, so direct numeric comparisons can be misleading without official plan context.
  • Agent builders still need clearer guidance about retries, stale reads, and fallback routing than most provider landing pages expose.

Best by use case

Assess institutional node access for Ethereum workflows

Blockdaemon

Compare archive-capable RPC infrastructure

Blast API

Compare AWS API evidence before runtime integration work

AWS API

Compare BNB Chain API evidence before runtime integration work

BNB Chain API

Compare Chainupcloud API evidence before runtime integration work

Chainupcloud API

Compare dedicated node API options

GetBlock

Compare Ethereum and Solana infrastructure options

QuickNode

Compare Ethereum API evidence before runtime integration work

Ethereum API

Compare Google API evidence before runtime integration work

Google API

Compare infrastructure providers before provider selection

Blockdaemon

Compare infrastructure routing models before provider selection

Pokt Network

Compare MetaMask API evidence before runtime integration work

MetaMask API

Compare node API providers for product reads

NOWNodes

Compare Pinata API evidence before runtime integration work

Pinata API

Compare Postman API evidence before runtime integration work

Postman API

Compare RPC infrastructure options before provider selection

OnFinality

Compare RPC infrastructure options for Ethereum reads

Chainstack

Compare RPC providers for Ethereum application reads

Ankr

Compare Syndica API evidence before runtime integration work

Syndica API

Compare thirdweb API evidence before runtime integration work

thirdweb API

Compare ZKsync API evidence before runtime integration work

ZKsync API

Evaluate decentralized RPC access for application requests

Pokt Network

Evaluate managed infrastructure before account setup

Infura

Evaluate managed node access for Web3 applications

Chainstack

Prototype blockchain reads through managed endpoints

Blast API

Prototype endpoint routing before provider account setup

Ankr

Prototype Ethereum RPC access for an application

Infura

Prototype explorer-style chain access before account setup

NOWNodes

Prototype multichain infrastructure access before provider account setup

Alchemy

Prototype RPC reads through shared endpoints

GetBlock

Route application reads to managed Polkadot infrastructure

OnFinality

Entries in this category

Coming soonNeeds re-verification

Managed RPC, archive node, and infrastructure services for Polkadot and other blockchain networks

Provider
OnFinality
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Polkadot
On-chain statePolkadot
Coming soonNeeds re-verification

Developer platform for Ethereum and multichain RPC, enhanced APIs, webhooks, and app infrastructure

Provider
Alchemy
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonNeeds re-verification

Ethereum and multichain API infrastructure for RPC access, IPFS, and developer network services

Provider
Infura
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonNeeds re-verification

RPC endpoint and blockchain infrastructure platform spanning Ethereum, Solana, and other networks

Provider
QuickNode
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
EthereumSolana
Indexed onlyProvider Profile

RPC and blockchain infrastructure network for developers needing multichain endpoint access

Provider
Ankr
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonNeeds re-verification

Managed blockchain nodes, RPC endpoints, and infrastructure tools for Web3 applications

Provider
Chainstack
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonNeeds re-verification

Institutional blockchain node infrastructure, staking, wallet, and API services for enterprises

Provider
Blockdaemon
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonNeeds re-verification

Blockchain node API service for shared and dedicated RPC access across major networks

Provider
GetBlock
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Indexed onlyProvider Profile

Blockchain-as-a-service provider offering explorer and node API access across many crypto networks

Provider
NOWNodes
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Indexed onlyProvider Profile

Decentralized RPC infrastructure network that routes application requests across independent node operators

Provider
Pokt Network
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonNeeds re-verification

Blockchain API platform for RPC endpoints, archive access, and Web3 infrastructure services

Provider
Blast API
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Ethereum
Ethereum
Coming soonProvider Profile

MetaMask API is an automation-built public Provider Profile for MetaMask public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
MetaMask
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
RequestedProvider Profile

Ethereum API is an automation-built evidence profile for Ethereum public API resources. Discovery has stable machine-fetchable docs evidence, but the official homepage freshness locator is currently unreachable and PubFi does not certify gateway runtime support for this provider

Provider
Ethereum
Page status
Draft / noindex
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

Chainupcloud API is an automation-built public Provider Profile for Chainupcloud public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Chainupcloud
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

Google API is an automation-built public Provider Profile for Google public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Google
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

Postman API is an automation-built public Provider Profile for Postman public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Postman
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
RequestedProvider Profile

AWS API is an automation-built public Provider Profile for AWS public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
AWS
Page status
Draft / noindex
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

Pinata API is an automation-built public Provider Profile for Pinata: Files API. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Pinata
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Ipfs
Coming soonProvider Profile

thirdweb API is an automation-built public Provider Profile for thirdweb: Engine API. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
thirdweb
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Base
BaseEthereum
Coming soonProvider Profile

BNB Chain API is an automation-built public Provider Profile for BNB Chain public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
BNB Chain
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

Cosmos Network API is an automation-built public Provider Profile for Cosmos Network public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Cosmos Network
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

ZKsync API is an automation-built public Provider Profile for ZKsync public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
ZKsync
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain
Coming soonProvider Profile

Syndica API is an automation-built public Provider Profile for Syndica public API resources. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Syndica
Page status
Indexable
Agent availability
Provider Profile
Primary category
Rpc Infra
Primary chain
Multichain
Multichain

Category coverage

OnFinality RPC infrastructure coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
Polkadot
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Alchemy RPC infrastructure coverage

Requested
Source
alchemy
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Infura RPC infrastructure coverage

Requested
Source
infura
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

QuickNode RPC infrastructure coverage

Requested
Source
quicknode
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum, solana
EthereumSolana
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Ankr RPC infrastructure coverage

Requested
Source
ankr
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Chainstack RPC infrastructure coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Blockdaemon RPC infrastructure coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

GetBlock RPC infrastructure coverage

Requested
Source
getblock
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

NOWNodes RPC infrastructure coverage

Requested
Source
nownodes
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Pokt Network RPC infrastructure coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

Blast API RPC infrastructure coverage

Requested
Source
blast-api
Auth
Api Key
Procurement
Free Requires Auth
Coverage
ethereum
Ethereum
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

MetaMask API rpc infra evidence

Requested
Source
metamask
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Ethereum API rpc infra evidence

Requested
Source
ethereum
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Chainupcloud API rpc infra evidence

Requested
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Google API rpc infra evidence

Requested
Source
google
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Postman API rpc infra evidence

Requested
Source
postman
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

AWS API rpc infra evidence

Requested
Source
aws
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Pinata API rpc infra evidence

Requested
Source
pinata
Auth
Api Key
Procurement
Not Procurable
Coverage
ipfs
rpc_response_recordchain_slug, method, response_shape, captured_at

thirdweb API rpc infra evidence

Requested
Source
thirdweb
Auth
Api Key
Procurement
Not Procurable
Coverage
base, ethereum
EthereumBase
rpc_response_recordchain_slug, method, response_shape, captured_at

BNB Chain API rpc infra evidence

Requested
Source
bnb-chain
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Cosmos Network API rpc infra evidence

Requested
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

ZKsync API rpc infra evidence

Requested
Source
zksync
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at

Syndica API rpc infra evidence

Requested
Source
syndica
Auth
Api Key
Procurement
Not Procurable
Coverage
multichain
Multichain
rpc_response_recordchain_slug, method, response_shape, captured_at