# GPT-5.5 Utility Tools for API.market

**Canonical:** https://apis.io/apis/558686-xyz/gpt55-utility-tools-api-market/  
**Provider:** gpt55-token-gateway — https://apis.io/providers/558686-xyz/  
**Base URL:** https://gpt55.558686.xyz/api-market  
**Documentation:** https://gpt55.558686.xyz/api-market

GPT-5.5 Utility Tools for API.market is one of 5 APIs that [gpt55-token-gateway](https://apis.io/providers/558686-xyz/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Developer Tools, Utilities, and Text Processing. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

A second, ordinary REST contract the same host serves for API.market source import: OpenAPI 3.1.0 at https://gpt55.558686.xyz/api-market/openapi.json with servers[] https://gpt55.558686.xyz/api-market and 44 operations (GET and POST pairs) over 22 deterministic developer utilities - text-stats, hash-text, base64-codec, url-parse, timestamp, jwt-decode, slugify, case-convert, regex-match, html-strip, query-parse, unique/sort/diff lines, json-minify, uri-codec, html-entity-codec, email-normalize, domain-extract, color-convert, uuid, json-keys. The spec says these call no LLM and fetch no remote URL and that commercial access, subscriber authentication, quotas and billing are configured in API.market; on the provider's own host they answered HTTP 200 anonymously with no payment (GET /api-market/v1/tools/timestamp?value=1700000000 and /api-market/v1/tools/text-stats?text=... on 2026-09-20), each response carrying an x402Lead block pointing at the paid GPT55 chat tiers. No securitySchemes are declared.

## Operations (44)

| Method | Path | Summary |
|---|---|---|
| GET | `/v1/tools/text-stats` | Count words, lines, bytes, and reading time via query parameters |
| POST | `/v1/tools/text-stats` | Count words, lines, bytes, and reading time |
| GET | `/v1/tools/hash-text` | Hash text with SHA or MD algorithms via query parameters |
| POST | `/v1/tools/hash-text` | Hash text with SHA or MD algorithms |
| GET | `/v1/tools/base64-codec` | Encode or decode Base64 via query parameters |
| POST | `/v1/tools/base64-codec` | Encode or decode Base64 |
| GET | `/v1/tools/url-parse` | Parse URL components via query parameters |
| POST | `/v1/tools/url-parse` | Parse URL components |
| GET | `/v1/tools/timestamp` | Convert timestamps and ISO dates via query parameters |
| POST | `/v1/tools/timestamp` | Convert timestamps and ISO dates |
| GET | `/v1/tools/jwt-decode` | Decode JWT header and payload via query parameters |
| POST | `/v1/tools/jwt-decode` | Decode JWT header and payload |
| GET | `/v1/tools/slugify` | Create URL slugs via query parameters |
| POST | `/v1/tools/slugify` | Create URL slugs |
| GET | `/v1/tools/case-convert` | Convert text casing via query parameters |
| POST | `/v1/tools/case-convert` | Convert text casing |
| GET | `/v1/tools/regex-match` | Run bounded regex matching via query parameters |
| POST | `/v1/tools/regex-match` | Run bounded regex matching |
| GET | `/v1/tools/html-strip` | Strip HTML to clean text via query parameters |
| POST | `/v1/tools/html-strip` | Strip HTML to clean text |
| GET | `/v1/tools/query-parse` | Parse URL query strings via query parameters |
| POST | `/v1/tools/query-parse` | Parse URL query strings |
| GET | `/v1/tools/unique-lines` | Deduplicate lines via query parameters |
| POST | `/v1/tools/unique-lines` | Deduplicate lines |
| GET | `/v1/tools/sort-lines` | Sort lines via query parameters |
| POST | `/v1/tools/sort-lines` | Sort lines |
| GET | `/v1/tools/diff-lines` | Compare line sets via query parameters |
| POST | `/v1/tools/diff-lines` | Compare line sets |
| GET | `/v1/tools/json-minify` | Minify JSON via query parameters |
| POST | `/v1/tools/json-minify` | Minify JSON |
| GET | `/v1/tools/uri-codec` | Encode or decode URI text via query parameters |
| POST | `/v1/tools/uri-codec` | Encode or decode URI text |
| GET | `/v1/tools/html-entity-codec` | Escape or unescape HTML entities via query parameters |
| POST | `/v1/tools/html-entity-codec` | Escape or unescape HTML entities |
| GET | `/v1/tools/email-normalize` | Normalize and validate email shape via query parameters |
| POST | `/v1/tools/email-normalize` | Normalize and validate email shape |
| GET | `/v1/tools/domain-extract` | Extract host and naive domain parts via query parameters |
| POST | `/v1/tools/domain-extract` | Extract host and naive domain parts |
| GET | `/v1/tools/color-convert` | Convert hex colors to RGB and HSL via query parameters |
| POST | `/v1/tools/color-convert` | Convert hex colors to RGB and HSL |
| GET | `/v1/tools/uuid` | Generate UUID v4 values via query parameters |
| POST | `/v1/tools/uuid` | Generate UUID v4 values |
| GET | `/v1/tools/json-keys` | List JSON key paths via query parameters |
| POST | `/v1/tools/json-keys` | List JSON key paths |

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/558686-xyz/refs/heads/main/openapi/558686-xyz-api-market-utility-tools-openapi.json
- **OpenAPI** — https://gpt55.558686.xyz/api-market/openapi.json
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/558686-xyz/refs/heads/main/overlays/558686-xyz-api-market-utility-tools-overlay.yaml
- **Documentation** — https://gpt55.558686.xyz/api-market

## Other gpt55-token-gateway APIs (4)

- [GPT55 Model Gateway API](https://apis.io/apis/558686-xyz/gpt55-model-gateway-api/)
- [GPT55 x402 Gateway MCP Server](https://apis.io/apis/558686-xyz/gpt55-mcp-server/)
- [GPT55 Model Gateway A2A Agent](https://apis.io/apis/558686-xyz/gpt55-a2a-agent/)
- [Sub2API OpenAI-compatible API](https://apis.io/apis/558686-xyz/sub2api-openai-compatible-api/)

## Tags

Developer Tools, Utilities, Text Processing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/558686-xyz/gpt55-utility-tools-api-market/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/558686-xyz/.