SNHP
SNHP (snhp.dev, operated by gametheory.dev / github.com/ryuxik and listed in the a2aregistry.org harvest as "Negotiation Copilot for Agents") is free, LLM-free game-theory negotiation math for AI agents: a hosted FastAPI "Game Theory Layer" with 74 operations served anonymously as OpenAPI 3.1 on snhp.dev that returns the math-optimal next move in a single-price or multi-issue negotiation in plain dollars, plus auction bidding and reserve pricing, mechanism design (Gale-Shapley, Myerson, posted-price clearance), a cryptographic first-strike commitment, and a verified-peer agent-to-agent flow that settles into signed AP2 Cart/Intent mandates. The same engine is exposed as a live streamable-HTTP MCP server with a 15-tool core door and a 54-tool pro door (listed in the official MCP registry and on Smithery), as a stdio server and Python library on PyPI (snhp, Apache-2.0), and behind an A2A agent card at the canonical well-known path. The core math is free with no key; a self-issued gt_* key unlocks a prepaid millicent wallet — funded by Stripe Checkout or agent-natively by the Machine Payments Protocol (Stripe Shared Payment Tokens) — that buys $2 receipted deterministic negotiation sessions and blind-custody encrypted agent memory, every settled call returning an Ed25519-signed receipt verifiable offline. A second application, the Evolution Arena on arena.snhp.dev, publishes its own OpenAPI for the live strategy-evolution sim, the gauntlet certificate and the PAR game. Single deployment, best-effort SLA stated in the API itself, no legal pages, GDPR access/erasure exposed as API operations.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles SNHP the way a machine reads it — 11 machine-readable artifacts across 2 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — SNHP scores 42.4/100 (developing), with a separate agent-readiness read of 52/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-19 · rubric v0.22.0
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile SNHP
Each block below is one kind of artifact we hold for SNHP. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 3
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
SNHP Game Theory Layer API
The hosted REST API on https://snhp.dev — 74 operations generated by FastAPI and served anonymously as OpenAPI 3.1.0 at /openapi.json (Swagger UI at /docs, ReDoc at /redoc). Fre...
SNHP MCP Server
Hosted streamable-HTTP MCP server (protocol 2025-06-18) with two doors on the same application: the core door https://snhp.dev/mcp/ (15 annotated tools — negotiate, negotiate_bu...
SNHP Evolution Arena API
A separate FastAPI application on https://arena.snhp.dev ("SNHP Evolution Arena — watch AI negotiators evolve, live") with 31 operations served anonymously as OpenAPI 3.1.0 at /...
MCP Servers 3
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
SNHP MCP Server
MCP SERVERMCP endpoint — pro door (54 tools)
MCP SERVERPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Snhp Dev Rate Limits
RATE LIMITSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for SNHP — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
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 6
Pagination, idempotency, versioning, errors, and events
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 4
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/snhp-dev · machine-readable index on apis.io
This is an independent, third-party profile of SNHP, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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