Caldera

Caldera builds a network of purpose‑built blockchains that interoperate to settle transactions on Ethereum. The platform enables developers to create modular, scalable chain solutions, offering tools for rollups, metalayer architecture, and cross‑chain asset transfers. Caldera’s ecosystem focuses on security, composability, and developer‑friendly APIs, aiming to accelerate decentralized finance and Web3 applications.

Caldera is listed with 1 API on the APIs.io network. Tagged areas include Blockchain, Interoperability, Ethereum, DeFi, and Platform.

The Caldera catalog on APIs.io includes 1 Spectral governance ruleset.

Caldera’s developer surface includes authentication, support, documentation, API reference, getting-started guide, engineering blog, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.2/100 thin Agent 44/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API 1 MCP Servers

Blockchain Interoperability Ethereum DeFi Platform

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 32.2/100 · thin

Contract Quality 2.2 / 21

Developer Ergonomics 12.0 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 4.8 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 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 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 10.5 — up to +22.4 composite points
Access Clarity scores 21.1 — up to +15.8 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/caldera/apis.yml: open an issue on github.com/api-evangelist/caldera to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

Caldera API

Caldera API as documented publicly: 1 operations. Contract generated from the documentation by API Evangelist (2026-10-29); not the provider's own document.

MCP Servers 1

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

Caldera MCP Server

Remote MCP server at docs.caldera.xyz.

MCP SERVER

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Caldera API Rules

9 rules · 7 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Caldera Authentication

1 scheme

SECURITY

Caldera Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Caldera Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Spectral

Vocabulary

Components

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: caldera
name: Caldera
description: Caldera builds a network of purpose‑built blockchains that interoperate to settle transactions on Ethereum. The
  platform enables developers to create modular, scalable chain solutions, offering tools for rollups, metalayer architecture,
  and cross‑chain asset transfers. Caldera’s ecosystem focuses on security, composability, and developer‑friendly APIs, aiming
  to accelerate decentralized finance and Web3 applications.
image: https://framerusercontent.com/images/jWh1D23dsV4YtQt0EbqBZ6K2Ds.png
url: https://artifacts.apis.io/caldera/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Blockchain
- Interoperability
- Ethereum
- DeFi
- Platform
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/caldera-rules.yml
- type: Vocabulary
  url: vocabulary/caldera-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Components
  url: components/caldera-components.yml
- type: Authentication
  url: authentication/caldera-authentication.yml
- type: Conformance
  url: conformance/caldera-conformance.yml
- type: LLMsTxt
  url: llms/caldera-llms.txt
- type: AgentCard
  url: a2a/caldera-a2a.yml
- type: MCPServer
  url: mcp/caldera-mcp.yml
- type: WellKnown
  url: well-known/caldera-well-known.yml
- type: Hosts
  url: hosts/caldera-hosts.yml
- type: Vendors
  url: vendors/caldera-vendors.yml
- type: SDKs
  url: packages/caldera-packages.yml
- type: Packages
  url: packages/caldera-packages.yml
- type: TermsOfService
  url: https://www.caldera.xyz/terms
- type: Support
  url: https://support.caldera.xyz/
- type: PrivacyPolicy
  url: https://www.caldera.xyz/privacy
- type: DomainSecurity
  url: security/caldera-domain-security.yml
- type: Website
  url: https://caldera.xyz
- type: Documentation
  url: https://docs.caldera.xyz
- type: APIReference
  url: https://docs.caldera.xyz/metalayer/sdk/api-reference
- type: GettingStarted
  url: https://docs.caldera.xyz/metalayer/sdk/getting-started
- type: Blog
  url: https://caldera.xyz/blog
- type: DeveloperPortal
  url: https://docs.caldera.xyz
apis:
- aid: caldera:caldera-api
  name: Caldera API
  description: 'Caldera API as documented publicly: 1 operations. Contract generated from the documentation by API Evangelist
    (2026-10-29); not the provider''s own document.'
  humanURL: https://docs.caldera.xyz/rollup-engine/deploying-contracts/foundry
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/caldera-openapi-generated.yml
    x-provenance: generated
x-backed-by:
- sequoia-capital
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The provider's documentation does not publish a machine‑readable OpenAPI spec; the only discovered spec was a sample
    unrelated to Caldera.
  evidence:
  - url: https://docs.caldera.xyz/rollup-engine/api-reference/openapi.json
    status: 200
  checked: '2026-10-29'
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Caldera API — frequently asked questions

Does Caldera have an API?

Yes. APIs.io lists 1 API from Caldera, including Caldera API.

Is there an OpenAPI specification for the Caldera API?

Yes. APIs.io indexes 1 OpenAPI specification for Caldera, each linked for download from this page.

How do I authenticate with the Caldera API?

Caldera documents its authentication (1 scheme). The details are profiled on APIs.io as Caldera Authentication.

Does Caldera have an MCP server?

Yes. APIs.io lists 1 MCP server for Caldera: Remote MCP server at docs.caldera.xyz.

Is the Caldera API ready for AI agents?

Caldera has a Kin Score of 32.2 out of 100 (thin) and an Agent Readiness score of 44.1 (agent-ready), scored by API Evangelist on 2026-10-31.

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MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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