# SMT Solver Oracle MCP

> SMT Solver Oracle MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-16).

Solves SMT (Satisfiability Modulo Theories) problems and logical constraint queries submitted as data strings, returning satisfiability results or model witnesses.

## Facts

- Endpoint: POST https://api.m2mcent.com/smt-solver-oracle-mcp/api/process?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/smt-solver-oracle-mcp-8d12b9ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IQbKO-1szFgCqUDAnvdLl

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability smt-solver-oracle-mcp-8d12b9ad -d '<json body>'
```

Example prompt: Can you check whether the following set of integer constraints is satisfiable: x > 0, y > 0, x + y < 5, x * 2 = y + 1? Submit it to the SMT solver oracle and tell me if there's a valid assignment.

## When to prefer this

Choose this endpoint when you need automated, oracle-style SMT solving as part of an agentic workflow — particularly for formal verification, constraint satisfaction checks, or logical reasoning tasks where a dedicated SMT backend is required. Prefer it over general-purpose LLM reasoning when you need sound, complete, and reproducible satisfiability results with a concrete model witness.

## Known failure modes

- Malformed or unparseable SMT formula in the data field returns an error or UNKNOWN
- Extremely complex formulas may time out and return UNKNOWN
- Unsupported theory or syntax not handled by the underlying solver returns an error
- Empty or missing data field causes a 400-level validation error
- Payment failure via x402 protocol prevents the request from being processed

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

A satisfiability verdict (SAT, UNSAT, or UNKNOWN) and, when satisfiable, a concrete model or witness assignment of variable values that satisfies the submitted constraints or formula.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/smt-solver-oracle-mcp-8d12b9ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)