Zerion

Zerion is an Ethereum and Solana wallet and developer platform focused on making onchain data easy to use. The Zerion API delivers clean, normalized wallet data, token analytics, DeFi positions, transaction history, PnL, NFTs, gas prices, swap and bridge quotes, and real-time transaction webhooks across EVM chains and Solana. The same infrastructure powers the Zerion wallet app used by millions. It is a JSON:API REST service with HTTP Basic (API key) authentication plus pay-per-request x402 (Base/Solana USDC) and MPP (Tempo USDC) options aimed at AI agents, an open-source CLI, six packaged agent skills, a hosted MCP server, and Kafka streaming for high-throughput pipelines.

Zerion publishes 9 APIs on the APIs.io network, including chains API, dapps API, fungibles API, and 6 more. Tagged areas include Company, Web3, Blockchain, Cryptocurrency, and DeFi.

The Zerion catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Zerion’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, engineering blog, authentication, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub
61.9/100 strong ▬ flat Agent 82/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessFreemiumSelf serve⚡ Free to try
9 APIs 1 MCP Servers
CompanyWeb3BlockchainCryptocurrencyDeFiWalletNFTEthereumSolanaPortfolioOnchain DataTransactions

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 61.9/100 · strong
Contract Quality 18.0 / 25
Developer Ergonomics 15.2 / 20
Commercial Clarity 15.3 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 82/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/zerion: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

Zerion chains API

Operations related to chains, such as list all chains.

Zerion dapps API

Operations related to decentralized applications, such as list them all, search or get by ID.

Zerion fungibles API

Operations related to fungible assets, such as list them all, search or get by ID.

Zerion gas API

Operations related to gas.

Zerion nfts API

Operations related to non fungible assets, such list them, search or get by ID.

Zerion subscriptions to transactions API

Operations related to subscriptions to transactions.

Zerion swap API

Operations related to swapping and bridging assets.

Zerion wallet sets API

Operations on a wallet set — aggregated portfolio data across at most one EVM address and one Solana address queried together.

Zerion wallets API

Operations related to wallets, such as portfolio charts, positions, and transactions.

Scroll for all 9

Arazzo Workflows 3

Multi-step API workflows described with the Arazzo specification.

_Index

ARAZZO

Zerion wallet activity subscription

Create a transaction webhook subscription for a set of wallets, confirm it, then verify the watched-wallet count.

ARAZZO

Zerion wallet overview

Pull a wallet's portfolio, positions, transaction history, and PnL in one flow.

ARAZZO

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

zerion-mcp.yml

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Zerion Plans

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Zerion Rate Limits

0 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Zerion Transactions Webhooks

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Zerion Authentication

http · 1 scheme

SECURITY

Zerion Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Zerion Agentic Access

39 operations · 8 acting · 1 human-in-the-loop

39 operations · 8 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown
 AgenticAccess
AgenticAccess

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel
 Webhooks
Webhooks
 Arazzo
Arazzo
 Arazzo
Arazzo

Scroll for all 8

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog
ChangeLog
 Deprecation
Deprecation
 RateLimits
RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans

Company 1

The organization behind the API

Blog
Blog

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: zerion
name: Zerion
description: Zerion is an Ethereum and Solana wallet and developer platform focused on making onchain data easy to use. The
  Zerion API delivers clean, normalized wallet data, token analytics, DeFi positions, transaction history, PnL, NFTs, gas
  prices, swap and bridge quotes, and real-time transaction webhooks across EVM chains and Solana. The same infrastructure
  powers the Zerion wallet app used by millions. It is a JSON:API REST service with HTTP Basic (API key) authentication plus
  pay-per-request x402 (Base/Solana USDC) and MPP (Tempo USDC) options aimed at AI agents, an open-source CLI, six packaged
  agent skills, a hosted MCP server, and Kafka streaming for high-throughput pipelines.
url: https://raw.githubusercontent.com/api-evangelist/zerion/refs/heads/main/apis.yml
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://developers.zerion.io/logo/dark.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
x-tier: profiled
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Web3
- Blockchain
- Cryptocurrency
- DeFi
- Wallet
- NFT
- Ethereum
- Solana
- Portfolio
- Onchain Data
- Transactions
apis:
- aid: zerion:zerion-chains-api
  name: Zerion chains API
  description: Operations related to chains, such as list all chains.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - chains
  properties:
  - type: OpenAPI
    url: openapi/zerion-chains-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-dapps-api
  name: Zerion dapps API
  description: Operations related to decentralized applications, such as list them all, search or get by ID.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - dapps
  properties:
  - type: OpenAPI
    url: openapi/zerion-dapps-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-fungibles-api
  name: Zerion fungibles API
  description: Operations related to fungible assets, such as list them all, search or get by ID.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - fungibles
  properties:
  - type: OpenAPI
    url: openapi/zerion-fungibles-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-gas-api
  name: Zerion gas API
  description: Operations related to gas.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - gas
  properties:
  - type: OpenAPI
    url: openapi/zerion-gas-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-nfts-api
  name: Zerion nfts API
  description: Operations related to non fungible assets, such list them, search or get by ID.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - nfts
  properties:
  - type: OpenAPI
    url: openapi/zerion-nfts-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-subscriptions-to-transactions-api
  name: Zerion subscriptions to transactions API
  description: Operations related to subscriptions to transactions.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - subscriptions to transactions
  properties:
  - type: OpenAPI
    url: openapi/zerion-subscriptions-to-transactions-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-swap-api
  name: Zerion swap API
  description: Operations related to swapping and bridging assets.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - swap
  properties:
  - type: OpenAPI
    url: openapi/zerion-swap-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-wallet-sets-api
  name: Zerion wallet sets API
  description: Operations on a wallet set — aggregated portfolio data across at most one EVM address and one Solana address
    queried together.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - wallet sets
  properties:
  - type: OpenAPI
    url: openapi/zerion-wallet-sets-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
- aid: zerion:zerion-wallets-api
  name: Zerion wallets API
  description: Operations related to wallets, such as portfolio charts, positions, and transactions.
  humanURL: https://developers.zerion.io/
  baseURL: https://api.zerion.io
  tags:
  - wallets
  properties:
  - type: OpenAPI
    url: openapi/zerion-wallets-api-openapi.yml
  - type: APIReference
    url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  - type: Documentation
    url: https://developers.zerion.io/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://developers.zerion.io/
  type: DeveloperPortal
- url: https://developers.zerion.io/
  type: Documentation
- url: https://developers.zerion.io/api-reference/wallets/get-wallet-portfolio
  type: APIReference
- url: https://developers.zerion.io/quickstart
  type: GettingStarted
- url: https://developers.zerion.io/pricing
  type: Pricing
- url: https://dashboard.zerion.io
  type: SignUp
- url: https://zerion.io/blog/tag/zerion-api/
  type: Blog
- url: https://github.com/zeriontech
  type: GitHubOrganization
- url: https://zerion.io/terms
  type: TermsOfService
- url: https://zerion.io/privacy
  type: PrivacyPolicy
- url: authentication/zerion-authentication.yml
  type: Authentication
- url: packages/zerion-packages.yml
  type: Packages
- url: packages/zerion-packages.yml
  type: SDKs
- url: cli/zerion-cli.yml
  type: CLI
- url: mcp/zerion-mcp.yml
  type: MCPServer
- url: skills/_index.yml
  type: AgentSkill
- url: llms/zerion-llms.txt
  type: LLMsTxt
- url: well-known/zerion-well-known.yml
  type: WellKnown
- url: conventions/zerion-conventions.yml
  type: Conventions
- url: errors/zerion-problem-types.yml
  type: ErrorCatalog
- url: lifecycle/zerion-lifecycle.yml
  type: Lifecycle
- url: changelog/zerion-changelog.yml
  type: ChangeLog
- url: https://developers.zerion.io/changelog
  type: Deprecation
- url: conformance/zerion-conformance.yml
  type: Conformance
- url: data-model/zerion-data-model.yml
  type: DataModel
- url: security/zerion-domain-security.yml
  type: DomainSecurity
- url: asyncapi/zerion-transactions-webhooks.yml
  type: Webhooks
- url: agentic-access/zerion-agentic-access.yml
  type: AgenticAccess
- url: overlays/zerion-api-overlay.yaml
  type: Overlay
- url: rate-limits/zerion-rate-limits.yml
  type: RateLimits
- url: plans/zerion-plans.yml
  type: Plans
- url: arazzo/zerion-wallet-overview.arazzo.yml
  type: Arazzo
  name: Zerion wallet overview
- url: arazzo/zerion-wallet-activity-subscription.arazzo.yml
  type: Arazzo
  name: Zerion wallet activity subscription
x-enrichment:
  date: 2026-07-21
  status: enriched
  artifacts_added: 28
  pass: local-v1