# SNHP

**Canonical:** https://apis.io/providers/snhp-dev/  
**Website:** https://snhp.dev/  
**APIs profiled:** 8

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.

## Kin Score — 41.0 / 100 (developing)

Scored 2026-10-09 under rubric 0.23.0. Trend: flat (+0.0 from 41.0).

| Facet | Score |
|---|---|
| Discoverability | 80.0 |
| Contract Quality | 37.6 |
| Contract Governance | 18.2 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 56.5 |
| Access Clarity | 42.1 |

Regulatory layer — **Payments**: 17.5 (matched via tags).

## Agent readiness — 43.4 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | verified |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | documented |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | near-conformant |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (23)

- **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 Arena API** — The Arena API from SNHP — 9 operation(s) for arena.
- **SNHP Auctions API** — Tier 2: single-unit auctions
- **SNHP Billing API** — The billing API from SNHP — 22 operation(s) for billing.
- **SNHP Block API** — The Block API from SNHP — 1 operation(s) for block.
- **SNHP Discovery API** — Catalog + agent onboarding
- **SNHP Divorce API** — The Divorce API from SNHP — 3 operation(s) for divorce.
- **SNHP Health API** — The Health API from SNHP — 1 operation(s) for health.
- **SNHP Helper API** — The helper API from SNHP — 4 operation(s) for helper.
- **SNHP Hit API** — The Hit API from SNHP — 2 operation(s) for hit.
- **SNHP Mechanism API** — Tier 3: marketplace operator primitives
- **SNHP Mpp API** — The mpp API from SNHP — 2 operation(s) for mpp.
- **SNHP Negotiation API** — Tier 1: multi-round bargaining
- **SNHP Notary API** — The notary API from SNHP — 2 operation(s) for notary.
- **SNHP Offer API** — General offer-graph engine: compile / profile / quote a JSON menu spec (discount-only, never above list)
- **SNHP Par API** — The Par API from SNHP — 12 operation(s) for par.
- **SNHP Rent API** — The rent API from SNHP — 2 operation(s) for rent.
- **SNHP SNHP Evolution Arena API** — The SNHP Evolution Arena API from SNHP — 1 operation(s) for snhp evolution arena.
- **SNHP Stats API** — The Stats API from SNHP — 1 operation(s) for stats.
- **SNHP Store API** — The store API from SNHP — 12 operation(s) for store.
- **SNHP Telemetry API** — Opt-in data sharing + GDPR (export/delete)
- **SNHP Vend API** — The vend API from SNHP — 3 operation(s) for vend.
- **SNHP World API** — The World API from SNHP — 1 operation(s) for world.

## MCP servers (2)

- **SNHP MCP Server** — SNHP runs a live, hosted, streamable-HTTP MCP server with TWO doors on the same application: the CORE door at https://snhp.dev/mcp/ (15 "hero-first" tools) and the PRO door at h...
- **MCP endpoint — pro door (54 tools)**

## Agentic access (1)

- **Snhp Dev Agentic Access** — 105 operations · 60 acting · 1 human-in-the-loop

## Security (2)

- **Snhp Dev Authentication** — apiKey/http-bearer/body-field/none · 5 schemes
- **Snhp Dev Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Snhp Dev Plans Pricing**

## Tags

Negotiation, Game Theory, AI Agents, MCP, A2A, Agentic Payments, Auctions, Mechanism Design, Pricing Optimization, Artificial Intelligence, Agent-Native, Developer Tools

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/snhp-dev/). Scores are computed from the provider's own public artifacts under a published rubric.