# String Technology Inc

**Canonical:** https://apis.io/providers/string-technology-inc/  
**Website:** https://string.xyz  
**APIs profiled:** 1

String (string.xyz) is a fiat interoperability platform for Web3 gaming, operated by String Technology Inc and backed by 500 Global. String lets game developers accept credit-card and bank payments natively inside their games, acting as the merchant of record and counterparty for fiat on/off ramps, NFT purchases, and cross-chain payments. A player pays fiat on traditional rails and String delivers the digital asset on-chain — either by interacting with the game's smart contract to mint/send an NFT or by sending a token from its treasury to the player's wallet. String ships three integration surfaces — String Checkout (drop-in payment app), a Unity SDK, and String Direct (custom web SDK) — all wrapping a REST API at string-api.xyz that covers API keys, contracts, platforms (games), members, organizations, users (players), saved cards, wallet-signature login, quotes, and transactions.

## Kin Score — 18.3 / 100 (emerging)

Scored 2026-08-19 under rubric 0.12.0. Trend: falling (-5.9 from 24.2).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 6.6 |
| Access Clarity | 6.6 |

Regulatory layer — **Payments**: 26.6 (matched via tags).

## Agent readiness — 13.0 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (1)

- **String API** — REST API for String's fiat-for-Web3-gaming platform — quotes and transactions (fiat on/off ramp, NFT purchase, cross-chain), plus management of API keys, contracts, platforms (g...

## MCP servers (1)

- **string-technology-inc-mcp.yml**

## Security (2)

- **String Technology Inc Authentication** — apiKey/walletSignature/session · 4 schemes
- **String Technology Inc Domain Security** — TLSv1.3 · HSTS

## Tags

Company, Payments, Web3, Gaming, Fiat On-Ramp, Cryptocurrency, NFT, Merchant of Record, Developer Tools

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