Ithaca

Ithaca is a crypto-infrastructure company (backed by Paradigm) building open-source developer tooling to accelerate the crypto frontier. Its flagship product, Porto, is a TypeScript SDK for passwordless authentication and payments on the web — letting applications and wallets create, manage, and interact with next-generation Ethereum accounts (keychains with passkeys, permissions, subscriptions, and native cross-chain interoperability) without passwords, extensions, seed phrases, or API keys. The stack also includes the Account smart contracts (Solidity), the Relay cross-chain transaction router and RPC server (Rust) for EIP-7702 accounts, and Odyssey, an experimental open-source Layer 2 testnet. The Ithaca team has since joined Tempo (tempo.xyz), and the Porto product is sunsetting on 2026-07-24 with users moving to porto.sh.

Ithaca is profiled on the APIs.io network. Tagged areas include Company, Crypto Infrastructure, Ethereum, Authentication, and Payments.

Ithaca’s developer surface includes documentation, getting-started guide, engineering blog, changelog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

15.5/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

0 APIs

Company Crypto Infrastructure Ethereum Authentication Payments Account Abstraction Smart Contracts Web3 SDK Cross-Chain

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 15.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 0.0 / 17

Operational Transparency 3.2 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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.

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/. This rating is computed from github.com/api-evangelist/ithaca: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

SDKs

SDKs

Packages

Packages

Access & Security 3

Authentication, authorization, and security posture

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: ithaca
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/ithaca.png
name: Ithaca
description: Ithaca is a crypto-infrastructure company (backed by Paradigm) building open-source developer tooling to accelerate
  the crypto frontier. Its flagship product, Porto, is a TypeScript SDK for passwordless authentication and payments on the
  web — letting applications and wallets create, manage, and interact with next-generation Ethereum accounts (keychains with
  passkeys, permissions, subscriptions, and native cross-chain interoperability) without passwords, extensions, seed phrases,
  or API keys. The stack also includes the Account smart contracts (Solidity), the Relay cross-chain transaction router and
  RPC server (Rust) for EIP-7702 accounts, and Odyssey, an experimental open-source Layer 2 testnet. The Ithaca team has since
  joined Tempo (tempo.xyz), and the Porto product is sunsetting on 2026-07-24 with users moving to porto.sh.
url: https://raw.githubusercontent.com/api-evangelist/ithaca/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- paradigm
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Crypto Infrastructure
- Ethereum
- Authentication
- Payments
- Account Abstraction
- Smart Contracts
- Web3
- SDK
- Cross-Chain
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.ithaca.xyz
- type: DeveloperPortal
  url: https://porto.sh
- type: Documentation
  url: https://porto.sh/sdk
- type: GettingStarted
  url: https://porto.sh/sdk
- type: Blog
  url: https://ithaca.xyz/updates
- type: ChangeLog
  url: https://porto.sh/changelog
- type: GitHubOrganization
  url: https://github.com/ithacaxyz
- type: SDKs
  url: packages/ithaca-packages.yml
- type: Packages
  url: packages/ithaca-packages.yml
- type: LLMsTxt
  url: llms/ithaca-llms.txt
- type: ChangeLog
  name: Changelog artifact
  url: changelog/ithaca-changelog.yml
- type: Security
  url: https://porto.sh/contracts/security-and-bug-bounty
- type: VulnerabilityDisclosure
  url: security/ithaca-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/ithaca-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence