esyURL

esyURL provides a short‑link and QR‑code service designed for AI agents. Since 2007 it lets agents create custom domains, redirect rules, and QR styles via a REST‑style MCP API. The platform offers a llms.txt prompt interface, auth.md documentation, and openapi.json spec for programmatic use. It targets developers building autonomous agents that need reliable link shortening and tracking, with usage statistics and bot detection. The service is operated by Filipe Boldo and emphasizes privacy, terms of use, and a simple, dashboard‑free experience.

esyURL publishes 8 API contracts indexed on the APIs.io network, including Auth API, Domain API, Groups API, and 5 more. Tagged areas include Company, Short Links, QR Codes, AI Agents, and MCP.

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

esyURL’s developer surface includes authentication, documentation, API reference, getting-started guide, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.4/100 thin Agent 51/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

1 published contract 1 MCP Servers

Company Short Links QR Codes AI Agents MCP

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 38.4/100 · thin

Contract Quality 13.3 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 2.9 / 17

Operational Transparency 0.5 / 11

Contract Governance 2.2 / 10

Discoverability 5.2 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 51/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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

MCP Tool Quality 6 / 6

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):

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) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's Ask about this →

3 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 17.0 — up to +16.6 composite points Ask about this →
Operational Transparency scores 4.8 — up to +12.4 composite points Ask about this →
Developer Ergonomics scores 46.9 — up to +10.6 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/esyurl-fyi/apis.yml: open an issue on github.com/api-evangelist/esyurl-fyi 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 4

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

esyURL Auth API

The auth API from esyURL — 7 operation(s) for auth.

esyURL Domain API

The domain API from esyURL — 2 operation(s) for domain.

esyURL Groups API

The groups API from esyURL — 5 operation(s) for groups.

esyURL Links API

The links API from esyURL — 6 operation(s) for links.

esyURL MCP API

The Mcp API from esyURL — 1 operation(s) for mcp.

esyURL Me API

The Me API from esyURL — 1 operation(s) for me.

esyURL Public API

The public API from esyURL — 7 operation(s) for public.

esyURL Render API

The Render API from esyURL — 1 operation(s) for render.

Scroll for all 8

MCP Servers 1

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

esyURL MCP Server

Remote MCP server at esyurl.fyi.

MCP SERVER

Semantic Vocabularies 1

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

Esyurl Fyi Context

27 classes · 107 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

esyURL API Rules

53 rules · 40 error-severity 12 warn-severity 1 info-severity

SPECTRAL

JSON Schema 8

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

AgentRegistration

10 properties

JSON SCHEMA

Domain

9 properties

JSON SCHEMA

LinkPageInput

9 properties

JSON SCHEMA

LinkVisits

10 properties

JSON SCHEMA

Me

2 properties

JSON SCHEMA

RenderRequest

12 properties

JSON SCHEMA

ShortLink

19 properties

JSON SCHEMA

UpdateLink

9 properties

JSON SCHEMA

Scroll for all 8

Security Posture 2

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

esyURL Authentication

apiKey/http · 2 schemes

SECURITY

esyURL Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

esyURL Agentic Access

42 operations · 21 acting · 2 human-in-the-loop

42 operations · 21 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Auth

Auth

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: esyurl-fyi
name: esyURL
description: esyURL provides a short‑link and QR‑code service designed for AI agents. Since 2007 it lets agents create custom
  domains, redirect rules, and QR styles via a REST‑style MCP API. The platform offers a llms.txt prompt interface, auth.md
  documentation, and openapi.json spec for programmatic use. It targets developers building autonomous agents that need reliable
  link shortening and tracking, with usage statistics and bot detection. The service is operated by Filipe Boldo and emphasizes
  privacy, terms of use, and a simple, dashboard‑free experience.
url: https://artifacts.apis.io/esyurl-fyi/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-07 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-11-07'
modified: '2026-11-07'
tags:
- Company
- Short Links
- QR Codes
- AI Agents
- MCP
tags_raw:
- Company
- ShortLinks
- QRCodes
- AIAgents
- MCP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/esyurl-fyi-agentic-access.yml
- type: Spectral
  url: rules/esyurl-fyi-rules.yml
- type: JSONLD
  url: json-ld/esyurl-fyi-context.jsonld
- type: Vocabulary
  url: vocabulary/esyurl-fyi-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/esyurl-fyi-data-model.yml
- type: ErrorCatalog
  url: errors/esyurl-fyi-problem-types.yml
- type: Conformance
  url: conformance/esyurl-fyi-conformance.yml
- type: LLMsTxt
  url: llms/esyurl-fyi-llms.txt
- type: MCPServer
  url: mcp/esyurl-fyi-mcp.yml
- type: WellKnown
  url: well-known/esyurl-fyi-well-known.yml
- type: Hosts
  url: hosts/esyurl-fyi-hosts.yml
- type: Vendors
  url: vendors/esyurl-fyi-vendors.yml
- type: GitHubOrganization
  url: https://github.com/fboldo
- type: Authentication
  url: authentication/esyurl-fyi-authentication.yml
- type: DomainSecurity
  url: security/esyurl-fyi-domain-security.yml
- type: Website
  url: https://esyurl.fyi/
- type: Documentation
  url: https://esyurl.fyi/llms.txt
- type: APIReference
  url: https://esyurl.fyi/openapi.json
- type: GettingStarted
  url: https://esyurl.fyi/llms.txt
- type: Auth
  url: https://esyurl.fyi/auth.md
- type: TermsOfService
  url: https://esyurl.fyi/legal/terms
- type: PrivacyPolicy
  url: https://esyurl.fyi/legal/privacy
apis:
- aid: esyurl-fyi:esyurl-fyi-auth-api
  name: esyURL Auth API
  description: The auth API from esyURL — 7 operation(s) for auth.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Authentication
  tags_raw:
  - auth
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-auth-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-agent-registration-schema.json
- aid: esyurl-fyi:esyurl-fyi-domain-api
  name: esyURL Domain API
  description: The domain API from esyURL — 2 operation(s) for domain.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Domain
  tags_raw:
  - domain
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-domain-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-domain-schema.json
- aid: esyurl-fyi:esyurl-fyi-groups-api
  name: esyURL Groups API
  description: The groups API from esyURL — 5 operation(s) for groups.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Group
  tags_raw:
  - groups
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-groups-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-short-link-schema.json
- aid: esyurl-fyi:esyurl-fyi-links-api
  name: esyURL Links API
  description: The links API from esyURL — 6 operation(s) for links.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Links
  tags_raw:
  - links
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-links-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-short-link-schema.json
  - type: JSONSchema
    url: json-schema/esyurl-fyi-link-visits-schema.json
  - type: JSONSchema
    url: json-schema/esyurl-fyi-link-page-input-schema.json
  - type: JSONSchema
    url: json-schema/esyurl-fyi-update-link-schema.json
- aid: esyurl-fyi:esyurl-fyi-mcp-api
  name: esyURL MCP API
  description: The Mcp API from esyURL — 1 operation(s) for mcp.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - MCP
  tags_raw:
  - Mcp
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-mcp-api-openapi.yml
- aid: esyurl-fyi:esyurl-fyi-me-api
  name: esyURL Me API
  description: The Me API from esyURL — 1 operation(s) for me.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Me
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-me-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-me-schema.json
- aid: esyurl-fyi:esyurl-fyi-public-api
  name: esyURL Public API
  description: The public API from esyURL — 7 operation(s) for public.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Public
  tags_raw:
  - public
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-public-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-render-request-schema.json
- aid: esyurl-fyi:esyurl-fyi-render-api
  name: esyURL Render API
  description: The Render API from esyURL — 1 operation(s) for render.
  humanURL: https://esyurl.fyi/llms.txt
  baseURL: https://esyurl.fyi
  tags:
  - Render
  properties:
  - type: OpenAPI
    url: openapi/esyurl-fyi-render-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esyurl-fyi-render-request-schema.json
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

esyURL API — frequently asked questions

Does esyURL have an API?

Yes. APIs.io lists 8 APIs from esyURL, including esyURL Auth API, esyURL Domain API and esyURL Groups API, and 5 more.

Is there an OpenAPI specification for the esyURL API?

Yes. APIs.io indexes 8 OpenAPI specifications for esyURL, each linked for download from this page.

How do I authenticate with the esyURL API?

esyURL documents its authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as esyURL Authentication.

Does esyURL have an MCP server?

Yes. APIs.io lists 1 MCP server for esyURL: Remote MCP server at esyurl.fyi.

Is the esyURL API ready for AI agents?

esyURL has a Kin Score of 38.4 out of 100 (thin) and an Agent Readiness score of 51.2 (agent-ready), scored by API Evangelist on 2026-11-13.

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