Attestwire

Attestwire provides an online service to validate European e‑invoices such as XRechnung and Peppol. Users can paste invoice XML to see which rule failed, get plain‑language explanations, and understand required fixes. The platform also offers a Model Context Protocol (MCP) that lets AI assistants call fourteen compliance tools without an API key, with optional paid plans for higher limits. Documentation, guides, and a rule reference are available publicly.

Attestwire publishes 9 API contracts indexed on the APIs.io network, including Billing API, Diagnose API, Invoices API, and 6 more. Tagged areas include Attestwire, E-invoice, Validation, XRechnung, and PEPPOL.

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

Attestwire’s developer surface includes changelog, authentication, documentation, API reference, getting-started guide, support, pricing, and 32 more developer resources.

67.1/100 exemplar Agent 39/100 agent ready Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →
AccessFreemiumOpen⚡ Free to try
1 published contract 1 MCP Servers 2 Agent Skills
AttestwireE-invoiceValidationXRechnungPEPPOLMCP

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0
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/.
Show this score on your site. Kin Score badge preview for Attestwire It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/attestwire-com/"><img src="https://apis.io/badge/attestwire-com/card.svg" alt="Attestwire on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
  • 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
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
  • Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (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
6 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/attestwire-com/apis.yml: open an issue on github.com/api-evangelist/attestwire-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 →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

measured — observed by APIs.io (documented)
measured — observed by APIs.io (published)

APIs 9

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

Attestwire Billing API

Paddle-hosted subscription checkout, and the customer portal.

Attestwire Diagnose API

The Diagnose API from Attestwire — 1 operation(s) for diagnose.

Attestwire Invoices API

Validation, generation, evidence bundles and e-mail delivery. Metered.

Attestwire Keys API

Self-serve API key issuance.

Attestwire Meta API

Health and machine-readable descriptions.

Attestwire Peppol API

The Peppol API from Attestwire — 1 operation(s) for peppol.

Attestwire Recipient API

The Recipient API from Attestwire — 1 operation(s) for recipient.

Attestwire Records API

Shareable proof that a check ran. Public, unauthenticated, and free on every plan.

Attestwire Vat API

The Vat API from Attestwire — 1 operation(s) for vat.

Scroll for all 9

MCP Servers 1

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

Attestwire MCP Server

Remote MCP server at api.attestwire.com.

MCP SERVER

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

invoice-processing

AGENT SKILL

vat-verification

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Attestwire Com Rate Limits

2 limits

RATE LIMITS

Semantic Vocabularies 1

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

Attestwire Com Context

51 classes · 226 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Attestwire API Rules

71 rules · 51 errors 11 warnings 9 info

SPECTRAL

JSON Schema 6

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

InvoiceInput

43 properties

JSON SCHEMA

ParseResult

9 properties

JSON SCHEMA

SendAccepted

17 properties

JSON SCHEMA

TeachingError

8 properties

JSON SCHEMA

ValidationRecord

14 properties

JSON SCHEMA

ValidationResult

17 properties

JSON SCHEMA

Security Posture 4

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

Attestwire Com Domain Security

TLSv1.3 · HSTS

SECURITY

Attestwire Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Attestwire Com Trust Center

SOC 2, ISO 27001, GDPR

SECURITY

Agentic Access 1

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

Attestwire Com Agentic Access

21 operations · 12 acting

21 operations · 12 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

Access & Security 7

Authentication, authorization, and security posture

Scroll for all 7

Operate 5

Status, limits, changes, and where to get help

Commercial 4

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: attestwire-com
name: Attestwire
description: Attestwire provides an online service to validate European e‑invoices such as XRechnung and Peppol. Users can
  paste invoice XML to see which rule failed, get plain‑language explanations, and understand required fixes. The platform
  also offers a Model Context Protocol (MCP) that lets AI assistants call fourteen compliance tools without an API key, with
  optional paid plans for higher limits. Documentation, guides, and a rule reference are available publicly.
url: https://artifacts.apis.io/attestwire-com/apis.yml
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Open access
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-02'
  method: derived
image: https://attestwire.com/og.png
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Attestwire
- E-invoice
- Validation
- XRechnung
- PEPPOL
- MCP
tags_raw:
- Attestwire
- E-invoice
- Validation
- XRechnung
- Peppol
- API
- MCP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/attestwire-com-agentic-access.yml
- type: RateLimits
  url: rate-limits/attestwire-com-rate-limits.yml
- type: Plans
  url: plans/attestwire-com-plans-pricing.yml
- type: Spectral
  url: rules/attestwire-com-rules.yml
- type: JSONLD
  url: json-ld/attestwire-com-context.jsonld
- type: Vocabulary
  url: vocabulary/attestwire-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/attestwire-com-data-model.yml
- type: ChangeLog
  url: changelog/attestwire-com-changelog.yml
- type: Compliance
  url: https://attestwire.com/security
- type: Authentication
  url: authentication/attestwire-com-authentication.yml
- type: Lifecycle
  url: lifecycle/attestwire-com-lifecycle.yml
- type: ErrorCatalog
  url: errors/attestwire-com-problem-types.yml
- type: Conformance
  url: conformance/attestwire-com-conformance.yml
- type: LLMsTxt
  url: llms/attestwire-com-llms.txt
- type: ToolCrosswalk
  url: mcp/attestwire-com-tool-crosswalk.yml
- type: MCPServer
  url: mcp/attestwire-com-mcp.yml
- type: SecurityTxt
  url: well-known/attestwire-com-security.txt
- type: WellKnown
  url: well-known/attestwire-com-well-known.yml
- type: Hosts
  url: hosts/attestwire-com-hosts.yml
- type: Vendors
  url: vendors/attestwire-com-vendors.yml
- type: SDKs
  url: packages/attestwire-com-packages.yml
- type: Packages
  url: packages/attestwire-com-packages.yml
- type: Security
  url: https://attestwire.com/security
- type: ChangeLog
  url: https://attestwire.com/changelog
- type: TrustCenter
  url: security/attestwire-com-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/attestwire-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/attestwire-com-domain-security.yml
- type: Website
  url: https://attestwire.com/
- type: DeveloperPortal
  url: https://api.attestwire.com/docs
- type: Documentation
  url: https://api.attestwire.com/docs
- type: APIReference
  url: https://api.attestwire.com/docs
- type: GettingStarted
  url: https://attestwire.com/playground
- type: Support
  url: mailto:hello@attestwire.com
- type: Pricing
  url: https://attestwire.com/pricing
- type: TermsOfService
  url: https://attestwire.com/terms
- type: PrivacyPolicy
  url: https://attestwire.com/privacy
- type: StatusPage
  url: https://status.attestwire.com
- type: GitHubOrganization
  url: https://github.com/attestwire
apis:
- aid: attestwire-com:attestwire-com-billing-api
  name: Attestwire Billing API
  description: Paddle-hosted subscription checkout, and the customer portal.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Billing
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-billing-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-diagnose-api
  name: Attestwire Diagnose API
  description: The Diagnose API from Attestwire — 1 operation(s) for diagnose.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Diagnose
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-diagnose-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-invoices-api
  name: Attestwire Invoices API
  description: Validation, generation, evidence bundles and e-mail delivery. Metered.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-invoices-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-keys-api
  name: Attestwire Keys API
  description: Self-serve API key issuance.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-keys-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-meta-api
  name: Attestwire Meta API
  description: Health and machine-readable descriptions.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Meta
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-meta-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-peppol-api
  name: Attestwire Peppol API
  description: The Peppol API from Attestwire — 1 operation(s) for peppol.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - PEPPOL
  tags_raw:
  - Peppol
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-peppol-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-recipient-api
  name: Attestwire Recipient API
  description: The Recipient API from Attestwire — 1 operation(s) for recipient.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Recipient
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-recipient-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-records-api
  name: Attestwire Records API
  description: Shareable proof that a check ran. Public, unauthenticated, and free on every plan.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - Records
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-records-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
- aid: attestwire-com:attestwire-com-vat-api
  name: Attestwire Vat API
  description: The Vat API from Attestwire — 1 operation(s) for vat.
  humanURL: https://api.attestwire.com/docs
  baseURL: https://api.attestwire.com
  tags:
  - VAT
  tags_raw:
  - Vat
  properties:
  - type: OpenAPI
    url: openapi/attestwire-com-vat-api-openapi.yml
  - type: Documentation
    url: https://api.attestwire.com/docs
  - type: APIReference
    url: https://api.attestwire.com/openapi.json
  - type: JSONSchema
    url: json-schema/attestwire-com-invoice-input-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-result-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-validation-record-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-send-accepted-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-teaching-error-schema.json
  - type: JSONSchema
    url: json-schema/attestwire-com-parse-result-schema.json
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 42
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Attestwire API — frequently asked questions

Does Attestwire have an API?

Yes. APIs.io lists 9 APIs from Attestwire, including Attestwire Billing API, Attestwire Diagnose API and Attestwire Invoices API, and 6 more.

Is there an OpenAPI specification for the Attestwire API?

Yes. APIs.io indexes 9 OpenAPI specifications for Attestwire, each linked for download from this page.

How do I authenticate with the Attestwire API?

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

How much does the Attestwire API cost?

APIs.io lists 4 pricing plans for Attestwire, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does Attestwire have an MCP server?

Yes. APIs.io lists 1 MCP server for Attestwire: Remote MCP server at api.attestwire.com.

Is the Attestwire API ready for AI agents?

Attestwire has a Kin Score of 67.1 out of 100 (exemplar) and an Agent Readiness score of 38.9 (agent-ready), scored by API Evangelist on 2026-11-02.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

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

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • 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.
All 92 tools →

Call it yourself

curl for this page
This provider
curl "https://apis.io/api/v1/providers/attestwire-com"
All providers
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose
curl "https://apis.io/api/v1/providers/attestwire-com/operations?limit=25"
How their score was established
curl "https://apis.io/api/v1/providers/attestwire-com/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.