# SNHP Negotiation API

**Canonical:** https://apis.io/apis/snhp-dev/snhp-dev-negotiation-api/  
**Provider:** SNHP — https://apis.io/providers/snhp-dev/  
**Base URL:** https://snhp.dev/mcp/  
**Documentation:** https://snhp.dev/docs

SNHP Negotiation API is one of 23 APIs that [SNHP](https://apis.io/providers/snhp-dev/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Negotiation. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, a getting-started guide, authentication docs, and rate-limit docs.

Tier 1: multi-round bargaining

## Operations (15)

| Method | Path | Summary |
|---|---|---|
| POST | `/v1/negotiate/turn` | Plain-terms negotiation: dollars in, a dollar counter + message out |
| POST | `/v1/negotiate/bundle` | Multi-issue negotiation: logroll across several linked issues |
| POST | `/v1/a2a/open_session` | Verify both peers and derive peer_mode server-side |
| POST | `/v1/a2a/next_offer` | Offer recommendation using the SESSION's verified peer_mode |
| POST | `/v1/a2a/settle` | Emit signed AP2 Intent/Cart mandates for the agreed deal |
| POST | `/v1/advice/session` | Open Advice Session |
| POST | `/v1/advice/move` | Advice Move |
| POST | `/v1/advice/bundle` | Advice Bundle Move |
| POST | `/v1/advice/close` | Close Advice Session |
| POST | `/v1/negotiation/sell/next_offer` | Sell-side next-offer recommendation |
| POST | `/v1/negotiation/buy/next_offer` | Buy-side next-offer recommendation with defense bundle |
| POST | `/v1/dispute/negotiate` | Run a refund-dispute settlement negotiation: unaided vs. SNHP-coached |
| POST | `/v1/negotiation/detect_anchor_attack` | Z-score anchor-attack detection |
| POST | `/v1/negotiation/declare_first_strike` | Cryptographic commit to a buyer reservation (signed attestation) |
| POST | `/v1/negotiation/reveal_first_strike` | Reveal a first-strike commitment to obtain the binding offer |

## Machine-readable artifacts (12)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/openapi/snhp-dev-negotiation-api-openapi.yml
- **Documentation** — https://snhp.dev/docs
- **APIReference** — https://snhp.dev/redoc
- **GettingStarted** — https://snhp.dev/llms.txt
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/authentication/snhp-dev-authentication.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/conventions/snhp-dev-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/errors/snhp-dev-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/data-model/snhp-dev-data-model.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/rate-limits/snhp-dev-rate-limits.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/sandbox/snhp-dev-sandbox.yml
- **Documentation** — https://arena.snhp.dev/docs
- **LLMsTxt** — https://raw.githubusercontent.com/api-evangelist/snhp-dev/refs/heads/main/llms/snhp-dev-arena-llms.txt

## Other SNHP APIs (12)

- [SNHP MCP Server](https://apis.io/apis/snhp-dev/mcp-server/)
- [SNHP Arena API](https://apis.io/apis/snhp-dev/snhp-dev-arena-api/)
- [SNHP Auctions API](https://apis.io/apis/snhp-dev/snhp-dev-auctions-api/)
- [SNHP Billing API](https://apis.io/apis/snhp-dev/snhp-dev-billing-api/)
- [SNHP Block API](https://apis.io/apis/snhp-dev/snhp-dev-block-api/)
- [SNHP Discovery API](https://apis.io/apis/snhp-dev/snhp-dev-discovery-api/)
- [SNHP Divorce API](https://apis.io/apis/snhp-dev/snhp-dev-divorce-api/)
- [SNHP Health API](https://apis.io/apis/snhp-dev/snhp-dev-health-api/)
- [SNHP Helper API](https://apis.io/apis/snhp-dev/snhp-dev-helper-api/)
- [SNHP Hit API](https://apis.io/apis/snhp-dev/snhp-dev-hit-api/)
- [SNHP Mechanism API](https://apis.io/apis/snhp-dev/snhp-dev-mechanism-api/)
- [SNHP Mpp API](https://apis.io/apis/snhp-dev/snhp-dev-mpp-api/)

## Tags

Negotiation

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/snhp-dev/snhp-dev-negotiation-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/snhp-dev/.