Elements

Circle provides a full‑stack platform that offers regulated stablecoins such as USDC and EURC, tokenized money‑market funds, and wrapped BTC, along with APIs and services for digital‑asset accounts, payments, treasury management, on‑chain FX, and developer tools for building AI‑native and blockchain applications. It serves businesses, banks, developers, and institutional users that need to mint, hold, move, and trade digital currencies globally.

Elements is profiled on the APIs.io network. Tagged areas include Stablecoins, Digital Assets, Payments, Treasury Management, and Developer Services.

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

Elements’ developer surface includes CLI, changelog, authentication, support, signup flow, engineering blog, getting-started guide, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

41.6/100 developing Agent 26/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

Stablecoins Digital Assets Payments Treasury ManagementDeveloper ServicesTrading Services

Kin Score

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

Composite quality — 41.6/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 5.8 / 17

Operational Transparency 6.4 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 2.7 / 15

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 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 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 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 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/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 39.0 — up to +15.3 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Contract Governance scores 0.0 — up to +12.0 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/elements-io/apis.yml: open an issue on github.com/api-evangelist/elements-io 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 →

Event Specifications 1

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

Elements Io Webhooks

ASYNCAPI

Security Posture 2

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

Elements Io Authentication

1 scheme

SECURITY

Elements Io Domain Security

TLSv1.3

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

SignUp

SignUp

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Webhooks

Webhooks

Conventions

Conventions

Lifecycle

Lifecycle

Build 1

SDKs, sample code, and the tooling you integrate with

CLI

CLI

Access & Security 3

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

ChangeLog

Deprecation

Support

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: elements-io
name: Elements
image: https://cdn.prod.website-files.com/67116d0daddc92483c812e88/6a1ee203d94902c2fd7260bb_share-q2-2026-home.jpg
description: Circle provides a full‑stack platform that offers regulated stablecoins such as USDC and EURC, tokenized money‑market
  funds, and wrapped BTC, along with APIs and services for digital‑asset accounts, payments, treasury management, on‑chain
  FX, and developer tools for building AI‑native and blockchain applications. It serves businesses, banks, developers, and
  institutional users that need to mint, hold, move, and trade digital currencies globally.
url: https://raw.githubusercontent.com/api-evangelist/elements-io/refs/heads/main/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-25 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-25'
modified: '2026-10-25'
tags:
- Stablecoins
- Digital Assets
- Payments
- Treasury Management
- Developer Services
- Trading Services
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/elements-io-status-security.txt
- type: Webhooks
  url: asyncapi/elements-io-webhooks.yml
- type: CLI
  url: cli/elements-io-cli.yml
- type: ChangeLog
  url: changelog/elements-io-changelog.yml
- type: Conventions
  url: conventions/elements-io-conventions.yml
- type: Authentication
  url: authentication/elements-io-authentication.yml
- type: Deprecation
  url: https://developers.circle.com/cctp/migration-from-v1-to-v2.md
- type: Lifecycle
  url: lifecycle/elements-io-lifecycle.yml
- type: LLMsTxt
  url: llms/elements-io-llms.txt
- type: AgentCard
  url: a2a/elements-io-a2a.yml
- type: WellKnown
  url: well-known/elements-io-well-known.yml
- type: Hosts
  url: hosts/elements-io-hosts.yml
- type: Vendors
  url: vendors/elements-io-vendors.yml
- type: TermsOfService
  url: https://agents.circle.com/terms-of-use
- type: Support
  url: https://help.circle.com
- type: StatusPage
  url: https://status.circle.com/
- type: SignUp
  url: https://console.circle.com/signup
- type: PrivacyPolicy
  url: https://www.circle.com/legal/privacy-policy
- type: DeveloperPortal
  url: https://www.circle.com/developer
- type: Blog
  url: https://www.circle.com/blog
- type: GettingStarted
  url: https://developers.circle.com/stablecoins/quickstarts/transfer-usdc-evm
- type: Documentation
  url: https://developers.circle.com/
- type: APIReference
  url: https://developers.circle.com/llms.txt
- type: DomainSecurity
  url: security/elements-io-domain-security.yml
- type: Website
  url: http://www.elements.io
apis: []
x-backed-by:
- accel
x-coverage:
  state: none
  reason: no-developer-program
  method: derived
  generated: '2026-10-25'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes no developer documentation host and no machine-readable contract on its own domain
  evidence:
  - url: https://developers.circle.com/mcp
    status: null
  - url: https://www.elements.io/mcp
    status: 403
  - url: http://www.elements.io
    status: 200
x-enrichment:
  date: '2026-10-25'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Elements API — frequently asked questions

How do I authenticate with the Elements API?

Elements uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Elements Io Authentication.

Is the Elements API ready for AI agents?

Elements has a Kin Score of 41.6 out of 100 (developing) and an Agent Readiness score of 25.5 (agent-aware), scored by API Evangelist on 2026-10-31.

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