arcandledger-com

Arc & Ledger Accounting provides plain-English U.S. tax guides, IRS notice explanations, and free calculators tied to primary sources. Based in Los Angeles, the firm offers professional tax preparation, accounting, bookkeeping, and IRS representation services for self‑employed individuals, business owners, and Turkish‑American entrepreneurs. Established in 2016 as TACS Group and rebranded in 2025, it emphasizes transparent pricing and multilingual support.

arcandledger-com publishes 7 API contracts indexed on the APIs.io network, including Deadlines API, Interest Rates API, Notices API, and 4 more. Tagged areas include Accounting, Tax, Bookkeeping, Financial Services, and Los Angeles.

The arcandledger-com catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

arcandledger-com’s developer surface includes support, signup flow, pricing, documentation, API reference, authentication, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.6/100 developing Agent 46/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract

Accounting Tax Bookkeeping Financial Services Los Angeles

Kin Score

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

Composite quality — 43.6/100 · developing

Contract Quality 11.5 / 21

Developer Ergonomics 8.4 / 17

Access Clarity 7.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.0 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 46/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 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 0 / 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

4 more unmet checks in the Agent Readiness table above.

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

Operational Transparency scores 0.0 — up to +13.0 composite points
Contract Quality scores 54.0 — up to +11.5 composite points
Access Clarity scores 44.7 — up to +11.1 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/arcandledger-com/apis.yml: open an issue on github.com/api-evangelist/arcandledger-com 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 7

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

arcandledger-com Deadlines API

The Deadlines API from arcandledger-com — 2 operation(s) for deadlines.

arcandledger-com Interest Rates API

The Interest Rates API from arcandledger-com — 1 operation(s) for interest rates.

arcandledger-com Notices API

The Notices API from arcandledger-com — 2 operation(s) for notices.

arcandledger-com Openapi.json API

The Openapi.json API from arcandledger-com — 1 operation(s) for openapi.json.

arcandledger-com Tax Documents API

The Tax Documents API from arcandledger-com — 2 operation(s) for tax documents.

arcandledger-com Tax Parameters API

The Tax Parameters API from arcandledger-com — 2 operation(s) for tax parameters.

arcandledger-com Vintages API

The Vintages API from arcandledger-com — 1 operation(s) for vintages.

Scroll for all 7

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Arcandledger Com Context

4 classes · 16 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

arcandledger-com API Rules

9 rules · 8 errors 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Envelope

3 properties

JSON SCHEMA

Security Posture 2

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

Arcandledger Com Authentication

apiKey · 1 scheme

SECURITY

Arcandledger Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Arcandledger Com Agentic Access

11 operations

11 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

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

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

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 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: arcandledger-com
name: arcandledger-com
image: https://www.arcandledger.com/og-image.png
description: Arc & Ledger Accounting provides plain-English U.S. tax guides, IRS notice explanations, and free calculators
  tied to primary sources. Based in Los Angeles, the firm offers professional tax preparation, accounting, bookkeeping, and
  IRS representation services for self‑employed individuals, business owners, and Turkish‑American entrepreneurs. Established
  in 2016 as TACS Group and rebranded in 2025, it emphasizes transparent pricing and multilingual support.
url: https://www.arcandledger.comr-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Accounting
- Tax
- Bookkeeping
- Financial Services
- Los Angeles
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/arcandledger-com-agentic-access.yml
- type: Spectral
  url: rules/arcandledger-com-rules.yml
- type: JSONLD
  url: json-ld/arcandledger-com-context.jsonld
- type: Vocabulary
  url: vocabulary/arcandledger-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/arcandledger-com-data-model.yml
- type: ErrorCatalog
  url: errors/arcandledger-com-problem-types.yml
- type: Conformance
  url: conformance/arcandledger-com-conformance.yml
- type: LLMsTxt
  url: llms/arcandledger-com-llms.txt
- type: WellKnown
  url: well-known/arcandledger-com-well-known.yml
- type: Hosts
  url: hosts/arcandledger-com-hosts.yml
- type: Vendors
  url: vendors/arcandledger-com-vendors.yml
- type: TermsOfService
  url: https://www.arcandledger.com/terms-of-service/
- type: Support
  url: https://www.arcandledger.com/mcp/support/
- type: SignUp
  url: https://www.arcandledger.com/services/registered-agent/
- type: PrivacyPolicy
  url: https://www.arcandledger.com/privacy-policy/
- type: Pricing
  url: https://www.arcandledger.com/pricing/
- type: Newsroom
  url: https://www.arcandledger.com/press/
- type: Documentation
  url: https://www.arcandledger.com/guides/
- type: DeveloperPortal
  url: https://api.arcandledger.com<!--
- type: APIReference
  url: https://www.arcandledger.com/developers/
- type: Authentication
  url: authentication/arcandledger-com-authentication.yml
- type: DomainSecurity
  url: security/arcandledger-com-domain-security.yml
- type: Website
  url: https://arcandledger.com/
apis:
- aid: arcandledger-com:arcandledger-com-deadlines-api
  name: arcandledger-com Deadlines API
  description: The Deadlines API from arcandledger-com — 2 operation(s) for deadlines.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Deadlines
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-deadlines-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
- aid: arcandledger-com:arcandledger-com-interest-rates-api
  name: arcandledger-com Interest Rates API
  description: The Interest Rates API from arcandledger-com — 1 operation(s) for interest rates.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Interest Rates
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-interest-rates-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
- aid: arcandledger-com:arcandledger-com-notices-api
  name: arcandledger-com Notices API
  description: The Notices API from arcandledger-com — 2 operation(s) for notices.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Notices
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-notices-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
- aid: arcandledger-com:arcandledger-com-openapi-json-api
  name: arcandledger-com Openapi.json API
  description: The Openapi.json API from arcandledger-com — 1 operation(s) for openapi.json.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Openapi.json
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-openapi-json-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
- aid: arcandledger-com:arcandledger-com-tax-documents-api
  name: arcandledger-com Tax Documents API
  description: The Tax Documents API from arcandledger-com — 2 operation(s) for tax documents.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Tax Documents
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-tax-documents-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
- aid: arcandledger-com:arcandledger-com-tax-parameters-api
  name: arcandledger-com Tax Parameters API
  description: The Tax Parameters API from arcandledger-com — 2 operation(s) for tax parameters.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Tax Parameters
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-tax-parameters-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
- aid: arcandledger-com:arcandledger-com-vintages-api
  name: arcandledger-com Vintages API
  description: The Vintages API from arcandledger-com — 1 operation(s) for vintages.
  humanURL: https://www.arcandledger.com/developers/
  baseURL: https://api.arcandledger.com
  tags:
  - Vintages
  properties:
  - type: OpenAPI
    url: openapi/arcandledger-com-vintages-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arcandledger-com-envelope-schema.json
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 28
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

arcandledger-com API — frequently asked questions

Does arcandledger-com have an API?

Yes. APIs.io lists 7 APIs from arcandledger-com, including arcandledger-com Deadlines API, arcandledger-com Interest Rates API and arcandledger-com Notices API, and 4 more.

Is there an OpenAPI specification for the arcandledger-com API?

Yes. APIs.io indexes 7 OpenAPI specifications for arcandledger-com, each linked for download from this page.

How do I authenticate with the arcandledger-com API?

arcandledger-com documents its authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Arcandledger Com Authentication.

Is the arcandledger-com API ready for AI agents?

arcandledger-com has a Kin Score of 43.6 out of 100 (developing) and an Agent Readiness score of 46.1 (agent-ready), scored by API Evangelist on 2026-10-31.

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