Agent Bench

Agent Bench operates agenthaven.dev, a DNSSEC-signed zone that publishes AI agents through DNS-AID, and runs one live agent in it: the Agent Bench Travel Merchant at travel.agenthaven.dev — a proof-of-concept seller agent that quotes real flight fares (Google Flights via SerpApi) and turns a chosen quote into a Stripe test-mode payment intent under a buyer-supplied spending mandate. It is reachable over A2A (JSON-RPC 0.3, agent card at the canonical well-known path, pinned by SHA-256 digest and ES256 signature in the DNS SVCB record) and MCP (2025-06-18, two tools with full input and output schemas, anonymous tools/list). It publishes a SPIFFE JWT-SVID for the running instance, DANE TLSA pins, an ARD trust catalog, a GoDaddy ANS registration and a public hash-chained ledger of every quote, refusal and checkout. No OpenAPI, no SDKs, no pricing; no real money moves and no ticket is issued.

Agent Bench is listed with 1 API on the APIs.io network. Tagged areas include Agents, A2A, MCP, Agentic Commerce, and DNS-AID.

Agent Bench’s developer surface includes documentation, authentication, sandbox, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

18.2/100 emerging ▬ flat Agent 29/100 agent aware Front door AI 3/6 light Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

1 API 1 MCP Servers

Agents A2A MCP Agentic CommerceDNS-AIDTravel Flights Payments Agent Identity Proof of Concept Agent-Native

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 18.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 3.5 / 11

Contract Governance 1.9 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.3 / 15

Agent readiness — 29/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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 github.com/api-evangelist/agenthaven-dev: open an issue to ask a question, or submit a pull request to add artifacts. 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.

Agent Bench Travel Merchant

Seller agent for flight search and travel checkout, exposed on one host through two protocol doors: A2A JSON-RPC 0.3 at https://travel.agenthaven.dev/a2a (message/send with a Da...

MCP Servers 1

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

Agent Bench MCP Server

Agent Bench operates ONE remote MCP server at https://travel.agenthaven.dev/mcp, on the same host as its A2A JSON-RPC endpoint (/a2a) and its documentation. It is POST-only Stre...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Agenthaven Dev Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Agenthaven Dev Rate Limits

3 limits

RATE LIMITS

Security Posture 2

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

Agenthaven Dev Authentication

none/http-bearer-jwt · 2 schemes

SECURITY

Agenthaven Dev Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Agenthaven Dev Agentic Access

2 operations · 1 acting · 1 human-in-the-loop

2 operations · 1 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgenticAccess

WellKnown

LLMsTxt

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

DataModel

Conformance

Lifecycle

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 1

Pricing, plans, and the legal terms of use

Plans

Plans

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

AgentCard

AgentCard

Source (apis.yml)

aid: agenthaven-dev
name: Agent Bench
description: 'Agent Bench operates agenthaven.dev, a DNSSEC-signed zone that publishes AI agents through DNS-AID, and runs
  one live agent in it: the Agent Bench Travel Merchant at travel.agenthaven.dev — a proof-of-concept seller agent that quotes
  real flight fares (Google Flights via SerpApi) and turns a chosen quote into a Stripe test-mode payment intent under a buyer-supplied
  spending mandate. It is reachable over A2A (JSON-RPC 0.3, agent card at the canonical well-known path, pinned by SHA-256
  digest and ES256 signature in the DNS SVCB record) and MCP (2025-06-18, two tools with full input and output schemas, anonymous
  tools/list). It publishes a SPIFFE JWT-SVID for the running instance, DANE TLSA pins, an ARD trust catalog, a GoDaddy ANS
  registration and a public hash-chained ledger of every quote, refusal and checkout. No OpenAPI, no SDKs, no pricing; no
  real money moves and no ticket is issued.'
url: https://raw.githubusercontent.com/api-evangelist/agenthaven-dev/refs/heads/main/apis.yml
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: 'Full local enrichment pass 2026-09-19 (was: stub / harvest). Conformant A2A agent card, live anonymous MCP
  server, DNS-AID/DNSSEC/DANE discovery and a public audit ledger found on travel.agenthaven.dev; no OpenAPI.'
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Agents
- A2A
- MCP
- Agentic Commerce
- DNS-AID
- Travel
- Flights
- Payments
- Agent Identity
- Proof of Concept
- Agent-Native
tags_raw:
- Agents
- A2A
- MCP
- Agentic Commerce
- DNS-AID
- Travel
- Flights
- Payments
- Agent Identity
- Proof of Concept
- agent-native
apis:
- aid: agenthaven-dev:agent-bench-travel-merchant
  name: Agent Bench Travel Merchant
  description: 'Seller agent for flight search and travel checkout, exposed on one host through two protocol doors: A2A JSON-RPC
    0.3 at https://travel.agenthaven.dev/a2a (message/send with a DataPart {action, input} or a one-line TextPart) and MCP
    2025-06-18 at https://travel.agenthaven.dev/mcp (initialize, ping, tools/list, tools/call). Two operations, called in
    order: search_flights (anonymous; IATA codes and an ISO date in, up to two signed quotes valid ten minutes out — cheapest
    and fastest, with itinerary and EUR fare in minor units) and create_checkout (bearer JWT under a spending mandate; turns
    one quote into a Stripe test-mode payment intent and stops — no ticket, no real money). Every response carries a request
    id and an evidence block naming the merchant, the card digest and the SPIFFE signer; every call is written to the public
    hash-chained ledger at /ledger. No OpenAPI: the machine-readable contract is tools/list.'
  humanURL: https://travel.agenthaven.dev/
  baseURL: https://travel.agenthaven.dev
  tags:
  - A2A
  - MCP
  - Travel
  - Flights
  - Agentic Commerce
  - Agent-Native
  tags_raw:
  - A2A
  - MCP
  - Travel
  - Flights
  - Agentic Commerce
  - agent-native
  properties:
  - type: Documentation
    url: https://travel.agenthaven.dev/
  - type: AgentCard
    url: a2a/agenthaven-dev-a2a.yml
  - type: AgentCard
    name: A2A Agent Card (provider-hosted)
    url: https://travel.agenthaven.dev/.well-known/agent-card.json
  - type: MCPServer
    url: mcp/agenthaven-dev-mcp.yml
  - type: MCPServer
    name: MCP endpoint (Streamable HTTP, POST only)
    url: https://travel.agenthaven.dev/mcp
  - type: A2A
    name: A2A JSON-RPC endpoint (POST only, message/send)
    url: https://travel.agenthaven.dev/a2a
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://agenthaven.dev/
- type: Documentation
  url: https://travel.agenthaven.dev/
- type: AgentCard
  url: a2a/agenthaven-dev-a2a.yml
- type: MCPServer
  url: mcp/agenthaven-dev-mcp.yml
- type: AgenticAccess
  url: agentic-access/agenthaven-dev-agentic-access.yml
- type: WellKnown
  url: well-known/agenthaven-dev-well-known.yml
- type: LLMsTxt
  url: llms/agenthaven-dev-llms.txt
- type: Authentication
  url: authentication/agenthaven-dev-authentication.yml
- type: Conventions
  url: conventions/agenthaven-dev-conventions.yml
- type: Idempotency
  url: conventions/agenthaven-dev-conventions.yml
- type: ErrorCatalog
  url: errors/agenthaven-dev-problem-types.yml
- type: DataModel
  url: data-model/agenthaven-dev-data-model.yml
- type: RateLimits
  url: rate-limits/agenthaven-dev-rate-limits.yml
- type: Plans
  url: plans/agenthaven-dev-plans-pricing.yml
- type: Sandbox
  url: sandbox/agenthaven-dev-sandbox.yml
- type: Conformance
  url: conformance/agenthaven-dev-conformance.yml
- type: Lifecycle
  url: lifecycle/agenthaven-dev-lifecycle.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/agenthaven-dev-domain-security.yml
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 26
  pass: local-v3
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://travel.agenthaven.dev/.well-known/agent-card.json
  grade: conformant
  protocol_version: '0.3'
  control: 404

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