Pimlico

Pimlico is the world's most popular ERC-4337 account abstraction infrastructure platform, providing production bundler and paymaster APIs plus a platform management API for building, deploying, and operating smart accounts on Ethereum and 100+ EVM-compatible chains. Its verifying paymaster sponsors gas for gasless transactions, its ERC-20 paymaster lets users pay gas in stablecoins and other tokens, and its bundler submits, estimates, and tracks ERC-4337 user operations. Developers integrate through the permissionless.js TypeScript SDK (built on viem) against a single JSON-RPC endpoint keyed by chain, and manage sponsorship policies, API keys, and billing through the Pimlico dashboard.

Pimlico publishes 2 APIs on the APIs.io network. Tagged areas include Company, Account Abstraction, ERC-4337, Blockchain, and Ethereum.

Pimlico’s developer surface includes documentation, API reference, quickstart, support, pricing, signup flow, authentication, and 29 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.4/100 developing ▬ flat Agent 9/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessEnterprise

2 APIs

Company Account Abstraction ERC-4337 Blockchain Ethereum Web3 Paymaster Bundler Smart AccountsGas SponsorshipWallets Infrastructure

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 47.4/100 · developing

Contract Quality 0.0 / 21

Developer Ergonomics 10.4 / 17

Access Clarity 13.0 / 17

Operational Transparency 5.5 / 11

Contract Governance 1.9 / 10

Discoverability 6.5 / 9

Regulatory Posture 8.4 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/pimlico: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

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

Pimlico Bundler & Paymaster API

Unified ERC-4337 JSON-RPC endpoint exposing both the Pimlico bundler (eth_sendUserOperation, eth_estimateUserOperationGas, eth_getUserOperationReceipt, pimlico_getUserOperationG...

Pimlico Platform API

REST management API for the Pimlico platform used to create, list, retrieve, and update sponsorship policies that govern which user operations are eligible for gas sponsorship. ...

Pricing Plans 1

Published pricing tiers and plan structures.

Pimlico Plans

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Pimlico Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Pimlico Finops

FINOPS

Security Posture 4

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

Pimlico Authentication

apiKey · 1 scheme

SECURITY

Pimlico Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Pimlico Vulnerability Disclosure

security.txt · contact published

SECURITY

Pimlico Trust Center

SOC 2

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

Quickstart

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Lifecycle

Conformance

ErrorCatalog

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 7

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

TrustCenter

TrustCenter

Compliance

Compliance

Scroll for all 7

Operate 4

Status, limits, changes, and where to get help

Support

StatusPage

Deprecation

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: pimlico
name: Pimlico
description: Pimlico is the world's most popular ERC-4337 account abstraction infrastructure platform, providing production
  bundler and paymaster APIs plus a platform management API for building, deploying, and operating smart accounts on Ethereum
  and 100+ EVM-compatible chains. Its verifying paymaster sponsors gas for gasless transactions, its ERC-20 paymaster lets
  users pay gas in stablecoins and other tokens, and its bundler submits, estimates, and tracks ERC-4337 user operations.
  Developers integrate through the permissionless.js TypeScript SDK (built on viem) against a single JSON-RPC endpoint keyed
  by chain, and manage sponsorship policies, API keys, and billing through the Pimlico dashboard.
url: https://raw.githubusercontent.com/api-evangelist/pimlico/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Enterprise
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://avatars.githubusercontent.com/u/125581500?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 21
  pass: local-v1
tags:
- Company
- Account Abstraction
- ERC-4337
- Blockchain
- Ethereum
- Web3
- Paymaster
- Bundler
- Smart Accounts
- Gas Sponsorship
- Wallets
- Infrastructure
apis:
- name: Pimlico Bundler & Paymaster API
  description: Unified ERC-4337 JSON-RPC endpoint exposing both the Pimlico bundler (eth_sendUserOperation, eth_estimateUserOperationGas,
    eth_getUserOperationReceipt, pimlico_getUserOperationGasPrice, pimlico_getUserOperationStatus) and paymaster (pm_sponsorUserOperation,
    pm_getPaymasterData, pm_getPaymasterStubData, ERC-20 token quotes) methods, addressed per chain and authenticated with
    an API key query parameter.
  humanURL: https://docs.pimlico.io/references/bundler
  baseURL: https://api.pimlico.io
  properties:
  - type: APIReference
    url: https://docs.pimlico.io/references/bundler
  - type: Documentation
    url: https://docs.pimlico.io
- name: Pimlico Platform API
  description: REST management API for the Pimlico platform used to create, list, retrieve, and update sponsorship policies
    that govern which user operations are eligible for gas sponsorship. Uses cursor pagination (limit/starting_after/ending_before).
  humanURL: https://docs.pimlico.io/references/platform
  baseURL: https://api.pimlico.io
  properties:
  - type: APIReference
    url: https://docs.pimlico.io/references/platform/api/sponsorship-policies
  - type: Documentation
    url: https://docs.pimlico.io/references/platform
common:
- type: Website
  url: https://www.pimlico.io
- type: DeveloperPortal
  url: https://dashboard.pimlico.io
- type: Documentation
  url: https://docs.pimlico.io
- type: APIReference
  url: https://docs.pimlico.io/references/bundler
- type: Quickstart
  url: https://docs.pimlico.io/references/permissionless
- type: Support
  url: https://t.me/pimlicoHQ
- type: GitHubOrganization
  url: https://github.com/pimlicolabs
- type: Pricing
  url: https://www.pimlico.io/pricing
- type: SignUp
  url: https://dashboard.pimlico.io
- type: TermsOfService
  url: https://www.pimlico.io/tos
- type: PrivacyPolicy
  url: https://www.pimlico.io/privacy
- type: StatusPage
  url: https://status.pimlico.io
- type: X
  url: https://x.com/pimlicoHQ
- type: LLMsTxt
  url: llms/pimlico-llms.txt
- type: SecurityTxt
  url: well-known/pimlico-security.txt
- type: WellKnown
  url: well-known/pimlico-well-known.yml
- type: Packages
  url: packages/pimlico-packages.yml
- type: SDKs
  url: packages/pimlico-packages.yml
- type: Authentication
  url: authentication/pimlico-authentication.yml
- type: Conventions
  url: conventions/pimlico-conventions.yml
- type: DomainSecurity
  url: security/pimlico-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/pimlico-vulnerability-disclosure.yml
- type: Security
  url: https://www.pimlico.io/.well-known/security.txt
- type: TrustCenter
  url: security/pimlico-trust-center.yml
- type: Compliance
  url: security/pimlico-trust-center.yml
- type: Lifecycle
  url: lifecycle/pimlico-lifecycle.yml
- type: Deprecation
  url: lifecycle/pimlico-lifecycle.yml
- type: Conformance
  url: conformance/pimlico-conformance.yml
- type: ErrorCatalog
  url: errors/pimlico-error-codes.yml
- type: DataModel
  url: data-model/pimlico-data-model.yml
- type: Sandbox
  url: sandbox/pimlico-sandbox.yml
- type: RateLimits
  url: rate-limits/pimlico-rate-limits.yml
- type: Plans
  url: plans/pimlico-plans.yml
- type: FinOps
  url: finops/pimlico-finops.yml
- type: X-MCPServerCandidate
  url: mcp/pimlico-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io

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